Which of the following is an example of combination?

Form a passcode with 4 digits

Students line up in a queue to assembly

Choose 4 students in a class committee

Choose the chairperson, secretary and treasurer in a club

You put $2000 in an account with a simple interest rate of 1.5%. how long does it take for the account to earn $60?

Nick has box brads. he uses 4 brads for the first project. nick let’s b represent the original number of brads and finds that for the second project, the number of brads he uses is 8 more than half the difference of b and 4. write an expression to represent the number of brads he uses for the second project.

Math each whole number with a rational, exponential expression