Which expression is equivalent to 6 to the power of 6 times 6 to the power of -9

Abiologist is recording the loss of fish in a pond. he notes the number of fish, f, in the pond on june 1. on july 1 there were 63 fish in the pond, which is 52 fewer fish than were in the pond on june 1. which equation represents this situation? a. f – 52 = 63 b. f – 63 = 52 c. 63 – f = 52 d. f – 63 = –52

What is the measure of the smallest angle in the diagram? 15 29 32 45

At noon a tank contained 10cm water. after several hours it contained 7cm of water. what is the percent decrease of water in the tank?