A horse race has 13 entries and one person owns 3 of those horses. Assuming that there are no ties, what is the probability that those three horses finish first comma second and third (regardless of order)?

Determine the mean and variance of the random variable with the following probability mass function. f(x)=( 729divided by 91) (1 divided by 9) superscript x baseline comma x equals 1,2,3 round your answers to three decimal places (e.g. 98.765).

An initial investment of $100 is now valued at $150. the annual interest rate is 5%, compounded continuously. the equation 100e0.05t = 150 represents the situation, where t is the number of years the money has been invested. about how long has the money been invested? use your calculator and round to the nearest whole number. years

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base