An artist needs to make 30 identical square pyramids for a sculpture. To do this he makes this mold by removing a square pyramid from a rectangular prism. The material he uses for the mold weighs 4 g per cubic centimeter. How much does the mold Weigh? What is the volume of the mold?

what

look at the picture.

1.

ef : ab = 2 : 3

gf : cb = 2 : 3

gh : cd = 2 : 3

he : da = 2 : 3

2.

∠a ≅ ∠e

∠b ≅ ∠f

∠c ≅ ∠g

∠d ≅ ∠h

3.

use pythagorean theorem:

the length of the abcd trapezoid sides:

|ab| = 3 cm

|bc| = 10 cm

|cd| = 3(3) cm = 9 cm

|da| = 8 cm

the perimeter of abcd = 3 + 10 + 9 + 8 = 30 cm

the ratio of perimeters of the tarapezoids is equal 2 : 3.

substitute:

      cross multiply

      divide both sides by 3

i don't know i don't know

okey so the slope is -3/5 and the y -intercept is 7/5

hope this if needed hmu