If i know a5 = -48 and r = 2 in a geometric sequence, how do i find the 8th term and explicit formula? how can i calculate a1?

Which statement most accurately describe why the division property of exponents does not apply to the expression (-8)^2/(-3)^4

According to statistics a person will devote 32 years to sleeping and watching tv. the number of years sleeping will exceed the number of years watching tv by 18. over a lifetime, how many years will the person spend on each of these activities

The base of a triangle exceeds the height by 9 inches. if the area is 180 square inches, find the length of the base and the height of the triangle.