Write an algebraic expression for the quantity. Let x represent the unknown value.Triple a quantity.
A. 3 + x
B. 3 - x
C. 3x
D. x - 3
Answer: C
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Find the derivative of y.y = ln(sech (9x + 6))
A. tanh (9x + 6)
B. -tanh (9x + 6)
C. 
D. -9 tanh (9x + 6)
Find the indicated derivative. Assume that x is restricted so that ln is defined.
if z = (ln x)6 + 
6
A. 
- 
B. 6x (ln x)5 + 
C. 
+ 6x 
5
D. 
- 
For a person who is 100 centimeters tall, the body surface area B, in square meters, can be estimated from the weight w measured in kilograms. The relation is
.
A. Make a graph of body surface area versus weight. Include weights up to 100 kilograms.B. Is the graph concave up or concave down?C. Among people who are 100 centimeters tall, would weight gain have a greater effect on surface area for a lighter person or for a heavier person?
What will be an ideal response?
Find the surface area or volume.The region between the curve y = 
, -0.9 ? x ? 1.0, and the x-axis is revolved about the x-axis to generate a solid. Use a table of integrals to find the volume of the solid generated to two decimal places.
A. 3.81 B. 4.12 C. 3.40 D. 3.23