A medical researcher needs 42 people to test the effectiveness of an experimental drug. If 91 people have volunteered for the test, in how many ways can 42 people be selected?

The problem involves a ___ because the ___ of patients selected ___ matter.

At the beginning of year 1, carlos invests $600 at an annual compound interest rate of 4%. he makes no deposits to or withdrawals from the account. which explicit formula can be used to find the account's balance at the beginning of year 5? what is, the balance?

What is the area of the shaded sector?

Write the factored form of this trinomial 9x^2+18x-7