Please help with this question

3

Step-by-step explanation:

The shape is a triangular prism.

The volume of a triangular prism is the area of cross section times length.

Area of cross section is the area of a triangle.

15 × x × 1/2

15/2x

The length is 8 cm.

15/2x × 8

120/2x

The volume is given.

120/2x = 180

60x = 180

x = 180/60

x = 3

1. is 4 and 2. is 3

step-by-step explanation:

so if you look at the first one you see that 1 is to 4 and 2 is to 8 and so on, so you can see for every 1 there is a times 4 so if it were 3 then it would be 3*4 and it is 12

for number 2 it is 3 because 1 is to 3 and 2 is to 6 so for every 1 there is 3 so if it were 3 then there would be 3*3 = 9

12.5 feet

step-by-step explanation: