How many permutations exist of the letters a, b, c, d taken four at a time?

A. 24

B. 12

C. 4

38 = y/2. What equals y?

There are 5,000 employees in a company. Each year 20% of the employees retire, but the company hires 500 new employees after the reduction. Write a recursive rule to find the number of employees for any year

In 1969, there were 25 companies located in the research triangle. By 1970, there were 47 companies in the park. What is the percent of increase in the number of companies during this year?

If the nth term of a sequence is 2n + 4, what is the sum of the first n terms?

Mike went to a football game with his family. They bought 5 boxes of popcorn and 3 programs, and spent $41. Sean's family went to the same game, bought 3 boxes of popcorn and 2 programs, and spent $26.

A binomial probability experiment is conducted with the given parameters. Use technology to find the probability of x successes in the n independent trials of the experiment n=8, p=0.6, x<4

What is 2 3/5 + 1 3/5

Credit card A has an APR of 15.8% and an annual fee of $72, while credit card b has an Apr of 19.6% and no annual fee.

At another school they sell a different brand of gift wrap which costs $2 per package and cards for $5 per package. Your friends class sells 220 packages and earns a total of $695.

A publisher prints 1,912 copies of a book in each print run. If they print 305 runs, the manager wants to know about how many books will be printed. What is a reasonable estimate?