What's the answer to this Math Problem?

Cost of 28 trucks to remove the dirt=280 $

Step-by-step explanation:

The foundation have:

Length=42 feet =14 yards                                     : as 1 feet= 0.333333

Width=21 feet =  7 yards

Height= 6 feet = 2 yards

Volume of the foundation:

                   =Length*Width*height

                       =14*7*2

                       =14*14

       Volume=196 cubic yards

The volume of 1 truck that removes the dirt is 7 cubic yards

Number of trucks that will remove the whole dirt of the foundation:

                                =     196/7

    Number of trucks required to remove the dirt =28

Cost of 1 truck to remove the dirt = 10$

  Cost of 28 trucks to remove the dirt= 10*28 = 280 $

$280

Step-by-step explanation:

First we need to find the volume of the dirt that is to be hauled away.

We want it in yard ^3

length =42/3 = 14 yard

width =21/3 = 7 yards

height =  6/3 = 2yds

V = length * width *height

   = 14*7*2 = 196 yd^3

To find how many truck loads, divide by 7 cubic yds per truck

196 /7 = 28

We will need 28 truck loads

At 10 dollars per truckload

28*10 = 280

4sqrt5

step-by-step explanation:

the base has dimensions of 8 x 4, so the diagonal is 64 + 16 square rooted or 4sqrt5.