Solve.A plane flies 420 miles with the wind and 340 miles against the wind in the same length of time. If the speed of the wind is 26 mph, what is the speed of the plane in still air?
A. 252 mph
B. 272 mph
C. 237 mph
D. 247 mph
Answer: D
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Provide an appropriate response.Solve the system for x and y, expressing either value in terms of a or b, if necessary. Assume that a ? 0 and b ? 0. 
A. 
B. 
C. 
D. 
Solve the problem.Felipe Rivera's savings account has a balance of $2238. After 3 years what will the amount of interest be at 6% compounded quarterly?
A. $67.14 B. $437.79 C. $428.79 D. $442.79
Find the real solutions of the equation.
= 9
A. {79} B. {81} C. {121} D. {83}
Assume the distribution is normal. Use the area of the normal curve to answer the question. Round to the nearest whole percent.The average runner at a local college runs the mile in 4.5 minutes, with a standard deviation of .3 minutes. What is the probability that a person will run a mile in less than 4 minutes?
A. 5% B. 3% C. 4% D. 7%