Carla Eppelstein is saving her babysitting money to buy a bicycle. She usually babysits a total of 11 to 16 hours per week and charges $4.50 per hour. If the bicycle she wants is $147, in about how many weeks will she be able to pay for it

About three weeks.

Step-by-step explanation:

147 divided by 4.50 = 32.6

32.6 divided by 11 is almost 3. So about three weeks.

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: