Question

what is the volume of a waterbed mattress that is 7 ft by 4 ft by 1 ft?
a. 26 ft³ c. 31 ft³
b. 28 ft³ d. 35 ft³
please select the best answer from the choices provided
a
b
c
d

Explanation:

Step1: Recall Volume Formula

The volume \( V \) of a rectangular prism (which the waterbed mattress resembles) is given by \( V = l \times w \times h \), where \( l \) is length, \( w \) is width, and \( h \) is height.

Step2: Substitute Values

Here, \( l = 7 \, \text{ft} \), \( w = 4 \, \text{ft} \), and \( h = 1 \, \text{ft} \). Substituting into the formula: \( V = 7 \times 4 \times 1 \).

Step3: Calculate Result

\( 7 \times 4 = 28 \), and \( 28 \times 1 = 28 \). So the volume is \( 28 \, \text{ft}^3 \).

Answer:

B. \( 28 \, \text{ft}^3 \)