Let f(x) be differentiable at all x. Assume that for some given numbers a, b we have that for all x b, f′(x)>0. Prove that f(x) attains a global minimum.

idn

step-by-step explanation:

can you rephrase the question ? it is unclear : -)

step-by-step explanation:

the correct answers i think are b. and d.

give me brainliest if it is correct!

1,407.5 hours

step-by-step explanation:

we first convert all the time to hours and then sum them up.

there are 24 hours in 1 day, in 58 days, there are 24 x 58 = 1,392 hours.

there are 60 minutes in 1 hour, thus, 30 minutes will be equivalent to 30 / 60 = 0.5 hours.

therefore, the number of hours it will take mercury to complete a full rotation is 1,392 + 15 + 0.5 = 1,407.5 hours