1.) The last digit in an International Standard Book Number(ISBN) is called the check digit. It is calculated by multiplying the first digit by10, the second digit by9, the third digit by8, and so on through the ninthdigit, then summing these products and dividing by 11. The remainder is subtracted from 11 to give the check digit of the ISBN.

Find the missing digit d in the given ISBN.

21834d3937

the digit d is...

2.) Determine the number of ways to perform the task described.

Four players are to be selected from a 22-player baseball team to visit schools to support a summer reading program. In how many ways can this selection bemade?

There are (...?)different ways 4 players can be selected from a 22-player baseball team. (simplify answer and write whole number)

3.) A designer has designed differenttops, pants, and jackets to create outfits. How many different outfits can the models wear if she has designed the followingpieces?

four tops, three pants, two jackets

There are a total of how many outfits?