Can someone please check my answer?

For x≥0, √x⁵ + √9x =

(A) (x²+ 3)√x (This is the answer I got, is it correct? If it's not, can you please explain to me the correct process to get the right answer?)

(B) 10√x⁶

(C)√(x⁵+ 9x)

(D)x²+ 3

(E) 3x²

Apatient is given 50 mg dose of medicine the medicines effectiveness decreases every hour at a constant rate of 40% what is the exponential decay function that models this scenario how much medicine will be left in the patients system after 2 hours

Read the situations in the table below. then drag a graph and equation to represent each situation. indicate whether each of the relationships is proportional or non-proportional. edit : i got the right answer its attached

Adecorative window is made up of a rectangle with semicircles at either end. the ratio of ad to ab is 3: 2 and ab is 30 inches. what is the ratio of the area of the rectangle to the combined area of the semicircles? possible answers: a. 2: 3 b. 3: 2 c. 6: π d. 9: π e. 30: π