Which equation could be used to calculate the sum of the geometric series? HELP

Which of the following tables represents exponential functions?

Aportion of a hiking trail slopes downward at about an 84° angle. to the nearest tenth of a flot, what is the value of x, the distance the hiker traveled along the path, if he has traveled a horizontal distance of 120 feet? a. 143.3 b. 12.5 c. 120.7 d. 130.2

You are at a restaurant and owe $38 for your meal. you want to leave a 20% tip. how much will your tip be?