You brought 1.5 dozen bagels to school. a dozen bagels cost $5.98. you used a coupon that took $1.00 off of the total. how much did you pay for the bagels?

1 dozen cost 5.98

 so 1.5 dozen cost : 5.98 x 1.5 = 8.97

 a coupon takes $1 off the price so

8.97-1.00 = 7.97

 they cost a total of $7.97

since your problem is x^4 = 81, what you have to undeo is the "to the fourth power" part.

the inverse (opposite operation) of "to the fourth power" is "to the fourth root".

  (x^4) ^ ¼   = 81 ^ ¼  

  81 = 3^4     so (3 ^ 4) ^ ¼   =   3 ^ 1   = 3

by hand: (3 ^ 4) ^ ¼   =   3 ^ (4 x ¼) = 3 ^ 1   = 3   (when you take a power to a power, multiply the exponents.)

or, do it by calculator. one way of finding the fourth root is to use ^ (1/4)

step-by-step explanation:

the correct answer is 5 6 and 7