Question on photo, there are two parts, read carefully! will mark brainliest

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

Fast! find the length of cu. the triangles are similar. show your work.

What is the value of n in the equation -1/2(2n+4)+6=-9+4(2n+1)