Can someone explain how to do these two problems?

⦁ devin is making a candle by pouring melted wax into a mold in the shape of a square pyramid. each side of the base of the pyramid is 9 cm and the height of the pyramid is 10 cm. to get the wax for the candle, devin melts cubes of wax that are each 4 cm by 4 cm by 4 cm. how many of the wax cubes will devin need in order to make the candle? show your work.


(score for question 2: of 5 points)
⦁ rectangle 1 has length x and width y. rectangle 2 is made by multiplying each dimension of rectangle 1 by a factor of k, where k > 0.
⦁ are rectangle 1 and rectangle 2 similar? why or why not?
⦁ write a paragraph proof to show that the perimeter of rectangle 2 is k times the perimeter of rectangle 1.
⦁ write a paragraph proof to show that the area of rectangle 2 is times the area of rectangle 1.