Question

9. The length of a rectangular speaker is three

Answer 1

Answer:

$V=(3W^3+12W^2)\ units^3$

Step-by-step explanation:

we know that

The volume of a rectangular prism is equal to

$V=LWH$ -----> equation A

where

L is the length

W is the width

H is the height

we know that

$L=3W$ -----> equation B

$H=W+4$ ----> equation C

substitute equation B and equation C in equation A

$V=(3W)(W)(W+4)$

Apply distributive property

$V=(3W^3+12W^2)\ units^3$