Mary got her first job and opened a checking account. During the 3rd week she had $70 in her account. During the 6th week, she had $160 in her account. If the amount of money she had in her account grew linearly how much did she have in her account in the 4th week?

100 if it wrong my bad

Step-by-step explanation:

Option C. 85 cm² is the answer.

Step-by-step explanation:

The base of a pyramid is a square with side length of 5 cm.

Slant height of the lateral face of the pyramid = 6 cm.

We have to find the surface area of the pyramid.

Surface area of the pyramid = area of base + area of lateral faces.

Area of base = 5² = 25 cm²

Area of one lateral face = (base) (height)

                                       = × 5 × 6 = 15 cm²

Total area of 4 lateral faces = 4 × 15 = 60 cm²

Now surface area of square pyramid = 25 + 60 = 85 cm²

Option C. 85 cm² is the answer.