Help please need to do this ASAP

What is the pattern in the values as the exponents increase?

What is the 9th term in the geometric sequence described by this explicit formula? an=-6. (2)(n-1) apex

Abicycle training wheel has a radius of 3 inches. the bicycle wheel has a radius of 10 inches.approximately how much smaller, in square inches and rounded to the nearest hundredth, is the area of the training wheel than the area of the regular wheel? *