Carry out the indicated unit conversion. Round your answer, if appropriate.Use a chain of conversions with familiar measures of time to convert 8 weeks into seconds.
A. 80,640 seconds
B. 4,838,400 seconds
C. 201,600 seconds
D. 691,200 seconds
Answer: B
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Solve the problem.The minimum length L of a highway sag curve can be computed by L = 
,where ?1 is the downhill grade in degrees (?1 < 0°), ?2 is the uphill grade in degrees (?2 > 0°), S is the safe stopping distance for a given speed limit, h is the height of the headlights, and ? is the alignment of the headlights in degrees. Compute L for a 55-mph speed limit, where 
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and 
Round your answer to the nearest foot.
A. 846 ft
B. 869 ft
C. 824 ft
D. 893 ft
Graph y = f(x). Compare the graph to the graph of y = log x.y = log(x - 1)
A. Shifted 1 unit(s) to the left
B. Reflected across the x-axis and
shifted 1 unit(s) upward
C. Shifted 1 unit(s) to the right
D. Shifted 1 unit(s) downward
Use the Midpoint Rule with n = 4 to estimate the volume obtained by rotating about the region under the y-axis the region under the curve.
The choices are rounded to the nearest hundredth. Select the correct answer.
a. V = 0.156
b. V = 0.491
c. V = 1.851
d. V = 0.825
e. V = 1.142
Solve the problem.How long will it take a sample of radioactive substance to decay to half of its original amount, if it decays according to the function A(t) = 400e-0.247t, where t is the time in years? Round to the nearest hundredth of a year.
A. 27.06 yr B. 24.26 yr C. 98.80 yr D. 2.81 yr