(a) estimate the area under the graph of
f(x) = 10sqrt(x) from x = 0 to x = 4 using four approximating rectangles and right endpoints. (round your answers to four decimal places.)

b) repeat, instead using left endpoints.

the correct answer is the second option

the answer is (-8,-5)

step-by-step explanation:

the endpoint to midpoint is half the length. the length is (-2,-1) so when you are at the midpoint just add it to it to find your answer -6+(-2)= -8 and -4+(-1)=-5 so (-8,-5)