Which two square roots are used to estimate 47

Adriver from the university of florida women’s swimming and diving team is competing in the in ncaa zone b championships

Identify the initial amount a and the growth factor b in the exponential function. a(x)=680*4.3^x

Alex took his brother to a birthday party. the party was scheduled to last for 1 and 3/4 hours but they stayed for 4/5 of an hour more. how long did she stay at the party?