Question

Braiden wants to add a rectangular concrete slab to existing drivway. How much concrete should he order to make a 14 feet long, 8 1/2 feet wide and 8 inches thick slab?

Answer 1

@Michele_Laino

Answer 2

here, we have to compute the volume of the concrete slab. Now, the volume V of a parallelepiped whose side are a, b, and c is given by the subsequent formula:
\[\large V = a \times b \times c\]
In your case we have:
\[\large \begin{gathered}
a = 14 \hfill \\
b = 8\frac{1}{2} \hfill \\
c = 8 \hfill \\
\end{gathered} \]
so, what is V?

Answer 3

952

Answer 4

oops...I have made an error, we have to exprees all of the sides in inches, so:
\[\large \begin{gathered}
a = 14 \times 12 = ...? \hfill \\
b = \left( {8\frac{1}{2}} \right) \times 12 = ... \hfill \\
c = 8 \hfill \\
\end{gathered} \]

Answer 5

express*

Answer 6

a=168
b= 102
c= 8

Answer 7

ok!

Answer 8

so:
\[\large V = a \times b \times c = 168 \times 102 \times 8 = ...?\]

Answer 9

137,088

Answer 10

yes! please remember its unit of measure is inches^3

Answer 11

okay:) so whats the next step")

Answer 12

we have finished!

Answer 13

The answer book says 79.33

Answer 14

since the volume is measured in feet^3
so in order to get your answer, we have to divide 137,088 by 12^3= 1728, then we have:
\[\large V = a \times b \times c = \frac{{168 \times 102 \times 8}}{{1728}} = ...?\]

Answer 15

great!!! 79.33:)

Answer 16

:)