Answer:
-1
Step-by-step explanation: I did something similar to this
247 / 13 = 323 / x....247 to 13 hrs = 323 to x hrs
cross multiply
(247)(x) = (323)(13)
247x = 4199
x = 4199 / 247
x = 17 hrs <===
We can see that
There are four triangle on the surface
and five squares
For finding surface areas , we will find area of each surface and then add them
Calculation of area of triangle:
We are given
base=b=8
height=h=10
now, we can use area formula
![A=\frac{1}{2}*b*h](https://tex.z-dn.net/?f=%20A%3D%5Cfrac%7B1%7D%7B2%7D%2Ab%2Ah%20%20)
![A=\frac{1}{2}*8*10](https://tex.z-dn.net/?f=%20A%3D%5Cfrac%7B1%7D%7B2%7D%2A8%2A10%20%20)
![A=40](https://tex.z-dn.net/?f=%20A%3D40%20%20)
Calculation of area of square:
base=width=8
![A=8*8](https://tex.z-dn.net/?f=%20A%3D8%2A8%20)
![A=64](https://tex.z-dn.net/?f=%20A%3D64%20)
There are four triangle and five squares on the surface
so, we can find surface area
SA=4* triangle + 5*square
![SA=4*40+5*64](https://tex.z-dn.net/?f=%20SA%3D4%2A40%2B5%2A64%20)
![SA=480ft^2](https://tex.z-dn.net/?f=%20SA%3D480ft%5E2%20)
so, surface area is
.............Answer
2. 7/8 x 1/3
7 x 1 = 7
8 x 3 = 24
7/24
For 5, you didn’t put the 3 for the answer: 3 2/3