3) Find the third, fifth, and seventeenth terms of the sequence described by each explicit formula.
a) a(n)= 8 + 3(n-1)
b) a(n)= 7 - 2(n-1)
c) a(n)= 3 + (n - 1)/2
d) a(n)= -9.2 - 2.5(n - 1)

Given the function f(x) = log base 4(x+8) , find the value of f^-1(2)

Me because some of question i don’t understand

Aball is thrown from a height of 139 feet with an initial downward velocity of 15 ft/s. the ball's height h (in feet) after t seconds is given by the following. h=139-15t-16t^2 how long after the ball is thrown does it hit the ground? round your answer(s) to the nearest hundredth. (if there is more than one answer, use the "or" button.) t =