Saturday

April 18, 2015

April 18, 2015

Posted by **Beverly** on Saturday, April 2, 2011 at 9:09pm.

- algebra -
**Reiny**, Saturday, April 2, 2011 at 11:06pm18 = 3.5(1.12)^n

5.142857 = 1.12^n

take log of both sides and use log rules....

n = log 5.142857/log 1.12 = 14.45

so after 14 years the allowance will be below $18

but after 15 years it will be over $18

**Answer this Question**

**Related Questions**

algebra - Chellise saves one fifth of her allowance and spends two thirds of her...

math - Chelsie saves 1/5 of her allowance and spends 2/3 of her allowance at the...

Math - Kate saves 1/5 of her allowance and spends 2/3 of her allowance at the ...

Sewing and Technology - Which of the following represents the correct formula ...

Mathematoics - last week rowena spent 1/3 of her weekly allowance on snacks, 2/5...

math - each week kelly saves 1/2 of her allowance she spends 1/3 of her ...

Math - Can you check my work? If Angelona's weekly allowance is d dollars, which...

math - mario got his $10.00 weekly allowance on monday. he spent 25% of his ...

math - Mario got his $10.00 weekly allowance on Monday. He spent 25% of his ...

4 grade - Mario got his $10.00 weekly allowance on Monday. He spent 25% of his ...