Consider the function 
.
?
A: Estimate the value of 
at 
by calculating the average rate of change from 
to 
.
?
B: Estimate the value of 
at 
by calculating the average rate of change from 
to 
.
?
C: Which of the numbers you calculated in parts A and B is likely to give a better estimate for the true value of 
at 
?
What will be an ideal response?
?A: 7 ?B: 6.5?C: The answer in part B.
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Solve the problem.Find the center of mass of the solid enclosed between the cone with equation 
and the plane with equation 
if the density at any point is proportional to the distance from that point to the plane 
.
A. (
, 
, 
) = 
B. (
, 
, 
) = 
C. (
, 
, 
) = 
D. (
, 
, 
) = 
Solve the equation involving fractions.
+ 
= 
A. 4, 5 B. 3, 6 C. -3, -6 D. 2, 7
Write the function in terms of its cofunction. Assume that any angle in which an unknown appears is an acute angle.cos 31.2°
A. sin 58.8° B. cos 148.8° C. sec 148.8° D. sin 31.2°
Translate the sentence to an equation using x as the variable. Do not solve the equation.The product of negative four and a number is forty-eight.
A. -12x = 4 B. x ÷ (-4) = 48 C. -4x = 48 D. -4 + x = 48