A canoeist rows downstream in 0.5 hours and back upstream in 4 hours. What is the rate of the current if the distance rowed is 4 miles in each direction?
?
A. 4.5 mph
B. 3.5 mph
C. 4 mph
D. 2 mph
E. 7 mph
Answer: B
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Evaluate the integral.
A. 
?2
B. 
?2
C. 
?
D. 
?
In the problem, t is a real number and P = (x, y) is the point on the unit circle that corresponds to t. Find the exact value of the indicated trigonometric function of t.(
, 
)Find sin t.
A. 
B. 
C. 
D. 
Solve the problem.Use of the internet for shopping is increasing dramatically, but still is somewhat age dependent. When a popular web site that sells books asked the age of users who bought products from them over the internet, they obtained the following data. What is the probability that a buyer on this web site is aged 
A. 4.32% B. 2.67% C. 4.26% D. 2.74%
Solve. Write a mixed numeral for the answer.A worker has readings that take 2
minutes each to read and record. How many readings can be completed in 168 minutes?
A. 114 readings B. 63 readings C. 448 readings D. 10 readings