Multiply.8 ? (-4)
A. 40
B. -28
C. -32
D. -40
Answer: C
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Find the relative extrema of the function and classify each as a maximum or minimum.f(x) = -x3 + 15x2 - 72x + 3
A. Relative maximum: 
, relative minimum: 
B. Relative minimum: 
, relative maximum: 
C. Relative maximum: 
D. Relative minimum: 
A rock is dropped from a balloon hovering at 4800 ft above the ground. Its velocity at time t seconds is 
feet per second. Find how long it takes for the rock to reach the ground.Enter just a real number to one decimal place (no units).
Fill in the blank(s) with the appropriate word(s).
??The number of ordered lists of 7 different items, chosen 4 at a time is 840. ?
A. ?True B. ?False
Find the surface area of the surface S.S is the paraboloid x2 + y2 - z = 0 between the planes z = 
and z = 2.
A. 
?
B. 
?
C. 
?
D. 
?