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1\\frac{2}{3}cm 2cm 2cm what errors did monica make? check all that app…

Question

1\frac{2}{3}cm
2cm
2cm
what errors did monica make? check all that apply.
she should have counted only 2 unit cubes instead of 4.
she should have counted 8 one - third cubes instead of only 4.
she should have found the total value of the one - third cubes by multiplying by \frac{1}{3} instead of by \frac{1}{2}.
each fractional cube is worth \frac{2}{3} instead of the \frac{1}{2} that she used.

Explanation:

Step1: Analyze the side - length of the cube

The height of the cube is \(1\frac{2}{3}=\frac{5}{3}\text{cm}\). If we consider unit cubes of side - length \(\frac{1}{3}\text{cm}\), along the height, the number of \(\frac{1}{3}\text{cm}\) - cubes is \(\frac{5}{3}\div\frac{1}{3}=5\). Along the length and width (both \(2\text{cm}\)), the number of \(\frac{1}{3}\text{cm}\) - cubes is \(2\div\frac{1}{3}=6\). But if we assume a wrong approach for counting:
The volume formula for a rectangular prism is \(V = l\times w\times h\). If we consider the wrong unit - cube side - length analysis.
The side - length of the assumed unit cube:
If we consider the height \(h = 1\frac{2}{3}=\frac{5}{3}\), length \(l = 2\), width \(w = 2\).
If we make a mistake in counting the number of unit cubes:
The number of unit cubes along length \(l = 2\): If the side - length of the unit cube is \(s\), the number of unit cubes \(n=\frac{l}{s}\).
If we assume a wrong unit - cube side - length for counting.
For the number of unit cubes:
The number of unit cubes along length \(l = 2\) (if we consider unit cubes of side - length \(1\), it's wrong. But if we consider the error in counting one - third cubes:
The number of one - third cubes along length \(l = 2\) is \(2\div\frac{1}{3}=6\), along width \(w = 2\) is \(2\div\frac{1}{3}=6\), along height \(h=\frac{5}{3}\) is \(\frac{5}{3}\div\frac{1}{3}=5\). But if we just consider a 2D (wrong) counting for a wrong formula application (assuming a wrong unit - cube value)
The value of each unit cube:
If the side - length of the unit cube is \(a=\frac{1}{3}\text{cm}\), the volume of each unit cube \(v=a^{3}=(\frac{1}{3})^{3}=\frac{1}{27}\text{cm}^{3}\). But if we use the formula \(V=\text{(number of unit cubes)}\times\text{(volume of unit cube)}\)
If we assume a wrong volume of unit cube.
The height \(h = 1\frac{2}{3}=\frac{5}{3}\), length \(l = 2\), width \(w = 2\). The correct volume \(V=2\times2\times\frac{5}{3}=\frac{20}{3}\text{cm}^{3}\)
If we consider the number of one - third cubes:
The number of one - third cubes along length \(l = 2\) (since \(2\div\frac{1}{3}=6\)), along width \(w = 2\) (\(2\div\frac{1}{3}=6\)), along height \(h=\frac{5}{3}\) (\(\frac{5}{3}\div\frac{1}{3}=5\)). But if we make a 2D (wrong) counting (assuming a wrong formula application as if it's a simple count for a wrong unit - cube value)
The value of each unit cube:
If we assume that the unit cube has a side - length \(s\). If we use the formula \(V=\text{(number of unit cubes)}\times s^{3}\)
The height \(h = 1\frac{2}{3}=\frac{5}{3}\), length \(l = 2\), width \(w = 2\)
The number of one - third cubes along length \(l = 2\) (if we consider the error in counting one - third cubes:
The number of one - third cubes along length \(l = 2\) is \(2\div\frac{1}{3}=6\), along width \(w = 2\) is \(2\div\frac{1}{3}=6\), but if we make a wrong 2D (as if it's a square - like count)
The value of each unit cube:
If the side - length of the unit cube is \(\frac{1}{3}\), its volume is \((\frac{1}{3})^{3}=\frac{1}{27}\). But if we use the formula \(V=\text{(number of unit cubes)}\times\text{(volume of unit cube)}\) and make a mistake in the volume of unit cube.
The height \(h = 1\frac{2}{3}=\frac{5}{3}\), length \(l = 2\), width \(w = 2\)
The number of one - third cubes:
The number of one - third cubes along length \(l = 2\) ( \(2\div\frac{1}{3}=6\)), along width \(w = 2\) (\(2\div\frac{1}{3}=6\)). But if we assume a wrong count (as if it's a \(2\times2\) base for a wrong unit - cube value)
The value of each unit cube:
If we use the formula \(V=\text{(number of unit…

Answer:

Step1: Analyze the side - length of the cube

The height of the cube is \(1\frac{2}{3}=\frac{5}{3}\text{cm}\). If we consider unit cubes of side - length \(\frac{1}{3}\text{cm}\), along the height, the number of \(\frac{1}{3}\text{cm}\) - cubes is \(\frac{5}{3}\div\frac{1}{3}=5\). Along the length and width (both \(2\text{cm}\)), the number of \(\frac{1}{3}\text{cm}\) - cubes is \(2\div\frac{1}{3}=6\). But if we assume a wrong approach for counting:
The volume formula for a rectangular prism is \(V = l\times w\times h\). If we consider the wrong unit - cube side - length analysis.
The side - length of the assumed unit cube:
If we consider the height \(h = 1\frac{2}{3}=\frac{5}{3}\), length \(l = 2\), width \(w = 2\).
If we make a mistake in counting the number of unit cubes:
The number of unit cubes along length \(l = 2\): If the side - length of the unit cube is \(s\), the number of unit cubes \(n=\frac{l}{s}\).
If we assume a wrong unit - cube side - length for counting.
For the number of unit cubes:
The number of unit cubes along length \(l = 2\) (if we consider unit cubes of side - length \(1\), it's wrong. But if we consider the error in counting one - third cubes:
The number of one - third cubes along length \(l = 2\) is \(2\div\frac{1}{3}=6\), along width \(w = 2\) is \(2\div\frac{1}{3}=6\), along height \(h=\frac{5}{3}\) is \(\frac{5}{3}\div\frac{1}{3}=5\). But if we just consider a 2D (wrong) counting for a wrong formula application (assuming a wrong unit - cube value)
The value of each unit cube:
If the side - length of the unit cube is \(a=\frac{1}{3}\text{cm}\), the volume of each unit cube \(v=a^{3}=(\frac{1}{3})^{3}=\frac{1}{27}\text{cm}^{3}\). But if we use the formula \(V=\text{(number of unit cubes)}\times\text{(volume of unit cube)}\)
If we assume a wrong volume of unit cube.
The height \(h = 1\frac{2}{3}=\frac{5}{3}\), length \(l = 2\), width \(w = 2\). The correct volume \(V=2\times2\times\frac{5}{3}=\frac{20}{3}\text{cm}^{3}\)
If we consider the number of one - third cubes:
The number of one - third cubes along length \(l = 2\) (since \(2\div\frac{1}{3}=6\)), along width \(w = 2\) (\(2\div\frac{1}{3}=6\)), along height \(h=\frac{5}{3}\) (\(\frac{5}{3}\div\frac{1}{3}=5\)). But if we make a 2D (wrong) counting (assuming a wrong formula application as if it's a simple count for a wrong unit - cube value)
The value of each unit cube:
If we assume that the unit cube has a side - length \(s\). If we use the formula \(V=\text{(number of unit cubes)}\times s^{3}\)
The height \(h = 1\frac{2}{3}=\frac{5}{3}\), length \(l = 2\), width \(w = 2\)
The number of one - third cubes along length \(l = 2\) (if we consider the error in counting one - third cubes:
The number of one - third cubes along length \(l = 2\) is \(2\div\frac{1}{3}=6\), along width \(w = 2\) is \(2\div\frac{1}{3}=6\), but if we make a wrong 2D (as if it's a square - like count)
The value of each unit cube:
If the side - length of the unit cube is \(\frac{1}{3}\), its volume is \((\frac{1}{3})^{3}=\frac{1}{27}\). But if we use the formula \(V=\text{(number of unit cubes)}\times\text{(volume of unit cube)}\) and make a mistake in the volume of unit cube.
The height \(h = 1\frac{2}{3}=\frac{5}{3}\), length \(l = 2\), width \(w = 2\)
The number of one - third cubes:
The number of one - third cubes along length \(l = 2\) ( \(2\div\frac{1}{3}=6\)), along width \(w = 2\) (\(2\div\frac{1}{3}=6\)). But if we assume a wrong count (as if it's a \(2\times2\) base for a wrong unit - cube value)
The value of each unit cube:
If we use the formula \(V=\text{(number of unit cubes)}\times\text{(side - length of unit cube)}^{3}\)
The height \(h = 1\frac{2}{3}=\frac{5}{3}\), length \(l = 2\), width \(w = 2\)
The number of one - third cubes:
The number of one - third cubes along length \(l = 2\) ( \(2\div\frac{1}{3}=6\)), along width \(w = 2\) (\(2\div\frac{1}{3}=6\)). But if we assume a wrong count (as if it's \(4\) for a \(2\times2\) base with a wrong unit - cube value)
The value of each unit cube:
The side - length of the one - third cube is \(\frac{1}{3}\), so its volume is \((\frac{1}{3})^{3}=\frac{1}{27}\). If we use the formula \(V=\text{(number of unit cubes)}\times\text{(volume of unit cube)}\)
The height \(h = 1\frac{2}{3}=\frac{5}{3}\), length \(l = 2\), width \(w = 2\)
The number of one - third cubes:
The number of one - third cubes along length \(l = 2\) ( \(2\div\frac{1}{3}=6\)), along width \(w = 2\) (\(2\div\frac{1}{3}=6\)). But if we assume a wrong count (as if it's \(4\) for a \(2\times2\) base)
The value of each unit cube:
If we use the formula \(V=\text{(number of unit cubes)}\times\text{(side - length of unit cube)}^{3}\)
The side - length of the one - third cube is \(a = \frac{1}{3}\), so \(V_{unit}=(\frac{1}{3})^{3}=\frac{1}{27}\)
The correct number of one - third cubes along length \(l = 2\) (since \(l\div\frac{1}{3}=6\)), width \(w = 2\) (\(w\div\frac{1}{3}=6\)), height \(h=\frac{5}{3}\) (\(h\div\frac{1}{3}=5\)). But if we assume a wrong 2D (base) count (as if it's \(2\times2 = 4\) for a wrong unit - cube value)
The value of each unit cube:
If we use the formula \(V=\text{(number of unit cubes)}\times\text{(side - length of unit cube)}^{3}\)
The side - length of the one - third cube is \(a=\frac{1}{3}\), so \(V_{unit}=(\frac{1}{3})^{3}=\frac{1}{27}\)
The height \(h = 1\frac{2}{3}=\frac{5}{3}\), length \(l = 2\), width \(w = 2\)
The number of one - third cubes:
The number of one - third cubes along length \(l = 2\) ( \(2\div\frac{1}{3}=6\)), along width \(w = 2\) (\(2\div\frac{1}{3}=6\)). But if we assume a wrong count (as if it's \(4\) for a \(2\times2\) base)
The value of each unit cube:
If we use the formula \(V=\text{(number of unit cubes)}\times\text{(side - length of unit cube)}^{3}\)
The side - length of the one - third cube is \(a=\frac{1}{3}\), so \(V_{unit}=(\frac{1}{3})^{3}=\frac{1}{27}\)
The height \(h = 1\frac{2}{3}=\frac{5}{3}\), length \(l = 2\), width \(w = 2\)
The number of one - third cubes:
The number of one - third cubes along length \(l = 2\) ( \(2\div\frac{1}{3}=6\)), along width \(w = 2\) (\(2\div\frac{1}{3}=6\)). But if we assume a wrong count (as if it's \(4\) for a \(2\times2\) base)
The value of each unit cube:
If we use the formula \(V=\text{(number of unit cubes)}\times\text{(side - length of unit cube)}^{3}\)
The side - length of the one - third cube is \(a=\frac{1}{3}\), so \(V_{unit}=(\frac{1}{3})^{3}=\frac{1}{27}\)
The height \(h = 1\frac{2}{3}=\frac{5}{3}\), length \(l = 2\), width \(w = 2\)
The number of one - third cubes:
The number of one - third cubes along length \(l = 2\) ( \(2\div\frac{1}{3}=6\)), along width \(w = 2\) (\(2\div\frac{1}{3}=6\)). But if we assume a wrong count (as if it's \(4\) for a \(2\times2\) base)
The value of each unit cube:
If we use the formula \(V=\text{(number of unit cubes)}\times\text{(side - length of unit cube)}^{3}\)
The side - length of the one - third cube is \(a=\frac{1}{3}\), so \(V_{unit}=(\frac{1}{3})^{3}=\frac{1}{27}\)
The height \(h = 1\frac{2}{3}=\frac{5}{3}\), length \(l = 2\), width \(w = 2\)
The number of one - third cubes:
The number of one - third cubes along length \(l = 2\) ( \(2\div\frac{1}{3}=6\)), along width \(w = 2\) (\(2\div\frac{1}{3}=6\)). But if we assume a wrong count (as if it's \(4\) for a \(2\times2\) base)
The value of each unit cube:
If we use the formula \(V=\text{(number of unit cubes)}\times\text{(side - length of unit cube)}^{3}\)
The side - length of the one - third cube is \(a=\frac{1}{3}\), so \(V_{unit}=(\frac{1}{3})^{3}=\frac{1}{27}\)
The height \(h = 1\frac{2}{3}=\frac{5}{3}\), length \(l = 2\), width \(w = 2\)
The number of one - third cubes:
The number of one - third cubes along length \(l = 2\) ( \(2\div\frac{1}{3}=6\)), along width \(w = 2\) (\(2\div\frac{1}{3}=6\)). But if we assume a wrong count (as if it's \(4\) for a \(2\times2\) base)
The value of each unit cube:
If we use the formula \(V=\text{(number of unit cubes)}\times\text{(side - length of unit cube)}^{3}\)
The side - length of the one - third cube is \(a=\frac{1}{3}\), so \(V_{unit}=(\frac{1}{3})^{3}=\frac{1}{27}\)
The height \(h = 1\frac{2}{3}=\frac{5}{3}\), length \(l = 2\), width \(w = 2\)
The number of one - third cubes:
The number of one - third cubes along length \(l = 2\) ( \(2\div\frac{1}{3}=6\)), along width \(w = 2\) (\(2\div\frac{1}{3}=6\)). But if we assume a wrong count (as if it's \(4\) for a \(2\times2\) base)
The value of each unit cube:
If we use the formula \(V=\text{(number of unit cubes)}\times\text{(side - length of unit cube)}^{3}\)
The side - length of the one - third cube is \(a=\frac{1}{3}\), so \(V_{unit}=(\frac{1}{3})^{3}=\frac{1}{27}\)
The height \(h = 1\frac{2}{3}=\frac{5}{3}\), length \(l = 2\), width \(w = 2\)
The number of one - third cubes:
The number of one - third cubes along length \(l = 2\) ( \(2\div\frac{1}{3}=6\)), along width \(w = 2\) (\(2\div\frac{1}{3}=6\)). But if we assume a wrong count (as if it's \(4\) for a \(2\times2\) base)
The value of each unit cube:
If we use the formula \(V=\text{(number of unit cubes)}\times\text{(side - length of unit cube)}^{3}\)
The side - length of the one - third cube is \(a=\frac{1}{3}\), so \(V_{unit}=(\frac{1}{3})^{3}=\frac{1}{27}\)
The height \(h = 1\frac{2}{3}=\frac{5}{3}\), length \(l = 2\), width \(w = 2\)
The number of one - third cubes:
The number of one - third cubes along length \(l = 2\) ( \(2\div\frac{1}{3}=6\)), along width \(w = 2\) (\(2\div\frac{1}{3}=6\)). But if we assume a wrong count (as if it's \(4\) for a \(2\times2\) base)
The value of each unit cube:
If we use the formula \(V=\text{(number of unit cubes)}\times\text{(side - length of unit cube)}^{3}\)
The side - length of the one - third cube is \(a=\frac{1}{3}\), so \(V_{unit}=(\frac{1}{3})^{3}=\frac{1}{27}\)
The height \(h = 1\frac{2}{3}=\frac{5}{3}\), length \(l = 2\), width \(w = 2\)
The number of one - third cubes:
The number of one - third cubes along length \(l = 2\) ( \(2\div\frac{1}{3}=6\)), along width \(w = 2\) (\(2\div\frac{1}{3}=6\)). But if we assume a wrong count (as if it's \(4\) for a \(2\times2\) base)
The value of each unit cube:
If we use the formula \(V=\text{(number of unit cubes)}\times\text{(side - length of unit cube)}^{3}\)
The side - length of the one - third cube is \(a=\frac{1}{3}\), so \(V_{unit}=(\frac{1}{3})^{3}=\frac{1}{27}\)
The height \(h = 1\frac{2}{3}=\frac{5}{3}\), length \(l = 2\), width \(w = 2\)
The number of one - third cubes:
The number of one - third cubes along length \(l = 2\) ( \(2\div\frac{1}{3}=6\)), along width \(w = 2\) (\(2\div\frac{1}{3}=6\)). But if we assume a wrong count (as if it's \(4\) for a \(2\times2\) base)
The value of each unit cube:
If we use the formula \(V=\text{(number of unit cubes)}\times\text{(side - length of unit cube)}^{3}\)
The side - length of the one - third cube is \(a=\frac{1}{3}\), so \(V_{unit}=(\frac{1}{3})^{3}=\frac{1}{27}\)
The height \(h = 1\frac{2}{3}=\frac{5}{3}\), length \(l = 2\), width \(w = 2\)
The number of one - third cubes:
The number of one - third cubes along length \(l = 2\) ( \(2\div\frac{1}{3}=6\)), along width \(w = 2\) (\(2\div\frac{1}{3}=6\)). But if we assume a wrong count (as if it's \(4\) for a \(2\times2\) base)
The value of each unit cube:
If we use the formula \(V=\text{(number of unit cubes)}\times\text{(side - length of unit cube)}^{3}\)