Lynn is 4 years younger than her sister tobbe. if the sum of their ages is 18, how old are lynn and tobbe?

Noor brought 21 sheets of stickers. she gave 1/3 of a sheet to each of the 45 students at recess. she wants to give teachers 1 1/2 sheets each.

45 was divided by a power of ten to get 4.5. what power of ten was it divided by? people 4.5

The probability that a student graduating from suburban state university has student loans to pay off after graduation is .60. if two students are randomly selected from this university, what is the probability that neither of them has student loans to pay off after graduation?