Michael buys a pair of basketball shoes for $100. The shoes are a collector's item and double in price every 10 years. When will the shoes be valued at $700?

Rockwell hardness of pins of a certain type is known to have a mean value of 50 and a standard deviation of 1.1. (round your answers to four decimal places.) (a) if the distribution is normal, what is the probability that the sample mean hardness for a random sample of 8 pins is at least 51?

Consider that lines b and c are parallel. what is the value of x? what is the measure of the smaller angle?

Is the power produced directly proportional to the wind speed, give reasons for your answer?