9. evaluate f(x) = -2х2 - 4 fоr x = 3.
o
о-22
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etric
o
о-18
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о-10

Evaluate the integral. (sec2(t) i t(t2 1)8 j t7 ln(t) k) dt

At a sand and gravel plant, sand is falling off a conveyor and onto a conical pile at a rate of 16 cubic feet per minute. the diameter of the base of the cone is approximately three times the altitude. at what rate is the height of the pile changing when the pile is 12 feet high? (hint: the formula for the volume of a cone is v = 1 3 πr2h.)

Two times a number plus three times another number equals 4. three times the first number plus four times the other number is 7. find the numbers