Solve the problem.Joan can mow a 3-acre field in 4 hours. How long would it take her to mow a 1.5-acre field?
A. 5 hr
B. 2 hr
C. 4 hr
D. 0.5 hr
Answer: B
Mathematics
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Solve the problem.The rate of water usage for a business, in gallons per hour, is given by 
where t is the number of hours since midnight. Find the average rate of water usage over the interval 
A. 0.07 gallons per hour B. 4.24 gallons per hour C. 4.09 gallons per hour D. 4.12 gallons per hour
Mathematics
Simplify the rational expression.
A. 
B. 
C. 
D. - 
Mathematics
Graph the curve.r = 4 - 4 cos ? (cardioid)
A. 
B. 
C. 
D. 
Mathematics
Suppose 100 people counted the number of cars passing an intersection in one hour. Due to error, not all people get the same value. The mean is 75 and the standard deviation is 1. Use the sketch to find how many people report the following. 
More than 76 cars
A. 16 people B. 14 people C. 84 people D. 15 people
Mathematics