How do you do this question?

A) 0

Step-by-step explanation:

Use second fundamental theorem of calculus.

f(x) = ∫₄²ˣ √(x² − t) dt

f'(x) = √(x² − 2x) (2)

f'(x) = 2√(x² − 2x)

f'(2) = 2√((2)² − 2(2))

f'(2) = 0

y do u put "subscirbe to ence" on a app for ppl who need with their work?

the one that has a slope of 1/2 and is positive.

step-by-step explanation: 2 buckets 1 trip ; 4 buckets 2 trips and so on.