What is the value of the element at h23?
2
9
23
75

The parabola x= √y-9 opens: a.)up b.)down c.)right d.)left

The anwser cause i do not understand just plez

Abicycle training wheel has a radius of 3 inches. the bicycle wheel has a radius of 10 inches.approximately how much smaller, in square inches and rounded to the nearest hundredth, is the area of the training wheel than the area of the regular wheel? *