Help please! The graph below represents the purchasing power of your income with 8% inflation. How much is your monthly income if your purchasing power is $2500?

A)About $3000
B)About $2800
C)About $2700
D)About $2400

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?

At the beginning of a call to the cable company, a message tells customers, "after you finish talking to our customer service representative, you will be asked to take a five-question survey about the level of service you recieved. it would be appreciated if you could stay on the line to answer the survey questions." what type of sampling is the cable company using?

If i want to read a 124-page book in 3 weeks how many pages would i have to read each day?