Solve.A canoeist paddled 6 miles upstream in 6 hours and returned to his starting point downstream in 45 minutes. What was the speed of the current?
A. 5 mph
B. 4.5 mph
C. 3.5 mph
D. 4 mph
Answer: C
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Solve the problem.R and R' are similar rectangles. Suppose that the width of R is a and the width of R' is 4a. If the area of R is 50 sq. in., what is the area of R' ?
A. 800 sq. in. B. 200a sq. in. C. 400 sq. in. D. 200 sq. in. E. none of these
Find the standard form of the equation of the ellipse satisfying the given conditions.Center at (0, 0); Focus at (0, -2); Vertex at (0, 6)
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Use a proportion to solve the problem.If a computer prints 258 lines in 3 seconds, how many lines can it print per minute?
A. 5170 lines B. 2580 lines C. 5160 lines D. 5165 lines
Evaluate.Given that loga2 = 0.301, and loga3 = 0.477, find loga6
A. 0.144 B. 0.778 C. 0.091 D. Cannot be found from the given information.