Apaper model of the khafre pyramid in egypt has a square base 7.2 centimeters on each side. the slant height is 6 centimeters. how much paper was used to make the model?

138,24 cm^2 of paper were used to make the model

Step-by-step explanation:

We are asked to find the amount of paper used to make the pyramid. This is equivalent to the surface area, or the sum of the areas of each face of the pyramid

To find the surface area of a pyramid we may use the the perimeter and the slant height of the pyramid using:

SA(Surface area)= A + 1/2(p*h)

Where A is the area of the base , p is the permiter of the base  and h the measure of the slant height. Replacing the values given in the problem in this formula:

The area of the base A, as it is a square, is base^2

A= 7.2*7.2 = 51.84

The perimeter of the base is:

p= 7.2*4 = 28,8 so replacing the values

SA(Surface area)= A + 1/2(p*h) =51.84 + 1/2(28.8*6) = 51,84 + 86.4 = 138,24 cm^2

So, 138,24 cm^2 of paper were used to make the model

see explanation

step-by-step explanation:

since the sequence is geometric there is a common ratio r between consecutive terms, that is

r = 4 ÷ - 2 = - 2

r = - 8 ÷ 4 = - 2

r = 16 ÷ 8 = - 2

the next term - 13 must be incorrect as it should be - 32 for the sequence to be geometric.

the first 4 terms are therefore geometric with common ratio r = - 2

there is no grid

step-by-step explanation: