Question

entering numerical expressions and fractions
these questions ask for numerical answers that are not whole or decimal numbers.

there are two ways to enter these types of answers:

1. enter using calculator - style notation (see below)
2. after clicking in the answer box, click the yellow arrow that shows to the right of it to use the equation editor

examples of calculator - style entry:

enter	to get
sqrt(3)	$sqrt{3}$
5*10^6	$5cdot10^6$

many students find it easier to use the equation editor. watch this video to see how to use it. +

in some cases, you can give a decimal approximation instead of an exact answer, but be sure to check the directions first.

try it here. use the preview button to see how the computer is interpreting what you typed. if you see syntax error, check to make sure youre using the right format.

a) enter the expression $sqrt{7}$
your input:

b) enter the expression $dfrac{5}{7}$
your input:

notice that when you click on the answer box, it says below the box to enter a reduced fraction answer. this question will only accept fractions, not decimal answers.

c) enter the expression $5cdot10^7$
your input:

notice that when you click on the answer box, it says below the box to enter the answer in scientific notation. this question will not accept the standard form of the number.

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Explanation:

Step1: Match radical to calculator notation

Based on the given example for $\sqrt{3}$ being entered as sqrt(3), apply the same format for $\sqrt{7}$.

Step2: Match fraction to calculator notation

Based on the given example for $\frac{2}{5}$ being entered as 2/5, apply the same format for $\frac{5}{7}$.

Step3: Match scientific notation to calculator notation

Based on the given example for $5 \cdot 10^6$ being entered as 5*10^6, apply the same format for $5 \cdot 10^7$.

Answer:

A) sqrt(7)
B) 5/7
C) 5*10^7