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13.11.2020 •
Mathematics
(ILL GIVE YOU BRAINLIEST PLEASE HELP QUICK) the sum of spongebob squidward and plankton's ages is 174. Squidward is 4 more than twice the age of plankton. Spongebob is 2 years less than planktons age. Find out all their ages
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Ответ:
8 years
Step-by-step explanation:
Tim's account balance has an initial value of $6400 and is multiplied yearly by the factor 1.01. Thus, it can be described by the exponential equation ...
b = 6400·1.01^t
where b is the balance after t years.
Putting in the desired balance, we can find t.
6900 = 6400·1.01^t
1.078125 = 1.01^t . . . . . divide by 6400
log(1.078125) = t·log(1.01) . . . . take the logarithm of both sides
log(1.078125)/log(1.01) = t ≈ 7.56 ≈ 8 . . . . . divide by the coefficient of t
It will take Tim approximately 8 years to reach a balance of $6900.
_____
The problem can also be solved using a graphing calculator.