F(x) = √(9 - x) f^-1(x) = -x^2 + 9 (change the variables, solve for y) dy/dx f^-1(x) = -2x (power rule) this question seemed a little too easy, so i want to make sure it's right! i took the inverse and then took the derivative. it would have been incorrect to take the derivative and then the inverse, right?

How many bananas are in a fruit bowl that has 200 total apples and bananas if there are 31 bananas for every 93 apples

Complex numbers multiply √-4 * √-25 and show all intermediate steps. alternative notation is sqrt(-4) * sqrt(-25).

Abag contains 4 red, 7 blue and 5 yellow marbles. event a is defined as drawing a yellow marble on the first draw and event b is defined as drawing a blue marble on the second draw. if two marbles are drawn from the bag, one after the other and not replaced, what is p(b|a) expressed in simplest form? a. 7/16 b. 7/15 c. 14/16 d. 14/15