How many different 4-letter words can be made a. if the first letter must be K, X, or P and no letter may be repeated?
b. if repeats are allowed (but the first letter is K, X, or P)?
a. If all the letters are different there are
4-letter words.
b. If the letters may be the same there are
4-letter words

One positive number is 9 more than twice another. if their product is 95, find the numbers

Thompson and thompson is a steel bolts manufacturing company. their current steel bolts have a mean diameter of 127 millimeters, and a variance of 36. if a random sample of 35 steel bolts is selected, what is the probability that the sample mean would differ from the population mean by greater than 0.5 millimeters? round your answer to four decimal places.

In the field of thermodynamics, rankine is the unit used to measure temperature. one can convert temperature from celsius into rankine using the formula , what is the temperature in celsius corresponding to r degrees rankine? a. 9/5(c - 273) b. 9/5(c + 273) c. 5/9( c - 273) d. 5/9( c + 273)