At the end of each round of volleyball tournament, 1/2 of the teams are eliminated from the competition. If the tournament starts with 80 teams, which equation shows how many rounds, “r”, must be completed to have 5 teams left in the tournament?

Write the expression as a single natural logarithm. 2 in a - 4 in y

Jonathan can type 20 documents in 40 minutes ,and susan can type it in 30 minutes and jack can type it in 24 minutes working together ,how much time will it is take them type the same document

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?