If p(a)=0.5, p(b)=0.8, and p(a and b)=9, find p(a and b).

Ling listed all of the factors of a mystery number: 1,2,4,8,16,32 what is the mystery number?

Tod does not have any cookies. david gives jeff 8 cookies. then he splits half of the cookies he has left with tod. david let’s c represent the number of cookies that he starts with. he finds the number of cookies that tod has is 1/2 the difference of c and 8. write an expression to represent the number of cookies that tod has.

Barbara deposited $300 in the bank. if the bank pays her simple interest at the rate of 4 percent per year, how much money will she have in her account at the end of 9 months?