Problema Solution
Lupe emptied her bank and has
144 pennies and 121 nickels. Write
each of these numbers using a base
and an exponent. For the pennies use
12 as the base. For the nickels use 11
as the base.
Answer provided by our tutors
144 pennies with a base of 12:
144 = 12^x
144 / 12 = 12^(x - 1)
12 = 12^(x - 1)
x - 1 = 1
x = 2
144 = 12^2
121 nickels with a base of 11:
121 = 11^x
121 / 11 = 11^(x - 1)
11 = 11^(x - 1)
x - 1 = 1
x = 2
121 = 11^2