For the function f(x) = x + 9, find (f o f-1)(5) a. 14 b. 5 c. -5 d. 25

[10 points, algebra 2]according to my answer key the restrictions are -1 and 4. but why not positive 1?

The diameter of the moon is about 3500 km. approximate the surface area of the moon using the formula for the surface area of a sphere, s = 4πr2. write your answer in scientific notation.

In 2000 the average price of a football ticket was $48.28. during the next 4 years, the proce increased an average of 6% each year. a) write a model giving the average price (p), in dollars, of a ticket (t) in years after 2000.b) graph the model. estimate the year when the average ticket price was about $60