I need help solving this, please help

What is the square root of 45? (step by step working plz)

Which table represents points on the graph of h(x) = 3√-x+2?

The table below shows the approximate height of an object x seconds after the object was dropped. the function h(x)= -16x^2 +100 models the data in the table. for which value of x would this model make it the least sense to use? a. -2.75 b. 0.25 c. 1.75 d. 2.25