The science fair judges will be teachers and volunteers. each judge will view 5 projects. there are 133 science teachers. what is the fewest number of volunteers needed to have enough judges

Gabrielle's age is two times mikhail's age. the sum of their ages is 84. what is mikhail's age?

The moats separating people from the animals are 5 m wide for lions and 4 m wide for the elephants. if the lion’s moat is 4 m deep, how deep should the elephants’ moat be?

Problem 3 a bank charges a service fee of $7.50 per month for a checking account. a bank account has $85.00. if no money is deposited or withdrawn except the service charge, how many months until the account balance is negative