Emma has 16 crackers she eats some could she still have 16 left?

Which expression is equivalent to (3^2)^-2 a.-81 b.-12 c.1/81 d.1/12

Prove that the sum of two consecutive exponents of the number 5 is divisible by 30.if two consecutive exponents are 5n and 5n + 1, then their sum can be written as 30.

The cost of using a service is $0.25 per min. what equation correctly represents the total cost c, in dollars, for d days of use?