Question

How do I solve this?

Answer 1

Explanation:

When given a formula, and we know the values of the variables plug in the number and units

So,

Instead of Saying

`v = (bh)/(3)`

We know

B= 15 in^2

h=28 in

`v = \frac{(15)in {}^(2) * (28)in}{3}`

We know that

`2 {}^(2) * 2 = 2 {}^(3)`

So

`in {}^(2) * in {}^{} = in {}^(3)`

And ofc,

`15 * 28 = 420`

So we get

`v = \frac{420in {}^(3) }{3} = 140in {}^(3)`

So the correct answer is the fourth option.

This is a skill. you must master at Algebra and please remember this:

IF YOU ARE GIVEN A FORMULA AND YOU KNOW THE VALUE OF SOME VARIABLE IN THE FORMULA, SUBSITUTE THE VARIABLE FOR THE VALUE