16 Select the correct answer. Credit cards and charge cards differ in two important ways. One is the method of payment. What is the other difference? A. You can get a credit card from your bank but not a charge card.
B. You have to pay interest on charge cards but not on credit cards.
C. You have to pay interest on credit cards but not on charge cards.

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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 discriminant is 64 + 4*1*12 = 112

this is prime.

step-by-step explanation:

i think it is 70

step-by-step explanation: