Which applies the power of a power rule properly to simplify this expression?

(7^8)^-4

Cora bought a package of erasers. there are 4 pink erasers and 12 blue erasers. what is the ratio of pink erasers to blue erasers?

Aresearch group wants to find the opinions’ of city residents on the construction of a new downtown parking garage. what is the population of the survey downtown shoppers downtown visitors downtown workers city residents

Two times a number plus three times another number equals 4. three times the first number plus four times the other number is 7. find the numbers