First we find the volume of the triangular prism.

We find the area of the triangle, then we multiply that by the height.

So 7*6/2= 42/2=21

21*10= 210

Then if all the dimensions add another foot on to them then you get: 7, 8, and 11.

Then you do the same thing to find the area of this rectangular prism.

7*8/2=56/2=28

28*11= 308

Now, we calculate the growth from 210 to 308 in this proportion: 308/210=x/100

Solving it we get (cross multiplying):

210x=30800

x=146 2/3 or 146.66 percent increase.

I hope this helps!

6 0

3 years ago

What is the value of 1/2 x^3+3.4y when x=2 and y=5?

lora16 [44]

(1/2) * x^3 + 3.4y when X = 2 and Y = 5.
= (1/2) * (2^3) * 3.4(5)
= (1/2) * 8 * 17
= (1/2) * 136
= 136/2
= 68.

8 0

3 years ago