The equation b = 500 - (1.05)' gives the balance of a bank account t years since the account was opened. The graph shows the annual account balance for 10 years.

1. What is the average annual rate of change for
the bank account?

2. Is the average rate of change a good measure
of how the bank account varies? Explain your
reasoning.

45% of the trees in a park are apple trees. there are 27 apple trees in the park. how many trees are in the park in all?

Ineed here’s a picture of the question

"curse these trig-loving pirates! " devora mutters as she looks at the map. then, after thinking for a moment, she walks back to the entrance of the secret cave, measuring 48 meters along the way. after performing a calculation, devora walks back to the empty treasure, faces the entrance, and turns a certain number of degrees to her left before walking 89 meters to the treasure. supposing that the angle at the cave entrance is acute and that devora's calculations were correct, how many degrees did she turn?