Bret rockford bought a home with a 11.5% adjustable rate mortgage for 20 years. he paid $10.67 monthly per thousand on his original loan. at the end of 1 year he owes the bank $70,000. since then interest rates have increased to 13%. the bank will renew the mortgage at this rate, or bret can pay the bank $70,000. he decides to renew and will now pay $11.72 monthly per thousand on his loan. you can ignore the small amount of principal paid during the year. what was the old monthly payment? $what is the new monthly payment? $what is the percent increase in her monthly payment (to the nearest tenth)?

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)

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15% chance.

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3/10 times, the 5 year old will get a tablet. 5/10 times, the 13 yer old will get a tablet. multiply both fractions to get 15/100 times, both would have a tablet.

nope lol

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answer: i think you should do the math and pay attention in class : )

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that is truly what   think but if i get the answer i will