Simplify this power raised to a power: (5^4)4
1. expand using four factors of 5^4: 5^4 ∙ 5^4 ∙ 5^4 ∙ 5^4
2. apply the product of powers rule: 5^4+ 4+ 4+ 4
3. simplify: 5^x
what is the value of x in the simplified power?

Given the function f(x) = log base 4(x+8) , find the value of f^-1(2)

Simplify (a/b - b/a) times (a - a^2/a+b) a - a^2/a=b is a mixed number

Cassie is traveling 675 miles today to visit her brother and his family. so far, she has stopped for gas three times. at the first stop, she put in 7.1 gallons of gas and paid $23.79. at her second stop, she put in 5.8 gallons of gas and paid $19.08. and, at the third stop, 6.6 gallons and paid $20.39. at which stop did casey pay the most for gas?