Solve the problem using the percent equation. Write a sentence answering the question.Alex and Juana went on a 20-mile canoe trip with their class. On the first day they traveled 16 miles. What percent of the total distance did they canoe?
A. They canoed 0.8% of the total distance.
B. They canoed 80% of the total distance.
C. They canoed 100% of the total distance.
D. They canoed 1% of the total distance.
Answer: B
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Solve the problem.Find the measure of an angle whose supplement is 5 times the measure of its complement.
A. 33.8° B. 18° C. 36° D. 67.5°
Solve the problem. Round your answer, if appropriate.The volume of a sphere is increasing at a rate of 5 cm3/sec. Find the rate of change of its surface area when its volume is 
cm3. (Do not round your answer.)
A. 
cm2/sec
B. 
cm2/sec
C. 
cm2/sec
D. 10? cm2/sec
Suppose that y is directly proportional to x. Use the given information to find the constant of proportionality k. Then use y = kx to find y for the given value of x.y = 30 when x = 10;
Find y given x = 14.
A. k = - 3; y = - 42
B. k = 5; y = 70
C. k = 3; y = 42
D. k = 300; y = 
Solve the formula for the specified variable.
+ 
= 
for c
A. c = a + b
B. c = 
C. c = 
D. c = ab(a + b)