Solve.A random check of air flights last month showed that 131 of the 170 flights checked arrived on time. If the inspectors check 230 flights next month, how many can be expected to arrive on time? (Round to the nearest whole number.)
A. 1 flights
B. 97 flights
C. 177 flights
D. 298 flights
Answer: C
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Simplify.
A. 
B. 
C. 2
D. 
Solve the problem.Jim lowers his hot-air balloon by gradually releasing air from the balloon. Let y represent the height of Jim's balloon (in feet) x minutes after he began releasing air from the balloon. Match the correct scenario with the following graph. 
A. Jim released air form the balloon for some time, then stopped to enjoy the countryside, and finally decided to land. B. Jim kept releasing air from the balloon and landed. C. Jim enjoyed the countryside without lowering the balloon. He decided then to lower the balloon, and stayed at this height for a while. Then he decided to land. D. Jim spent hours enjoying the countryside without lowering the balloon, before deciding to land.
Determine whether f is continuous at c.f(x) = 
; c = 7
A. not continuous B. continuous
Solve the problem.The annual rainfall in Maine is a random variable with probability density function defined by 
for x in 
Find the probability that the rainfall is less than the mean.
A. 0.445 B. 0.500 C. 0.489 D. 0.447