SOLUTION: how would you find the starting amount if you only have the intest rate, time and final amount? ex: y=c(1+r)^t 400=?(1+0.042)^6

SOLUTION: how would you find the starting amount if you only have the intest rate, time and final amount? ex: y=c(1+r)^t 400=?(1+0.042)^6

Algebra.Com

Question 746860: how would you find the starting amount if you only have the intest rate, time and final amount?
ex:
y=c(1+r)^t
400=?(1+0.042)^6
Answer by checkley79(3341) (Show Source): You can put this solution on YOUR website!
400=?(1+0.042)^6
400=X(1.042)^6
400=X*1.28
X=400/1.28
X=$312.50 ANS.
RELATED QUESTIONS
Suppose you are given a radioactive substance. After 30 days there is 1/10 of the... (answered by josgarithmetic)

Here is the formula used to find compound interest. In this situation, interest is... (answered by Alan3354,Theo)

an opened a savings account and deposited $1,000.00. The account earns 1% interest,... (answered by fractalier)

Complete the table for a savings account subject to 360 compoundings yearly. Formula (answered by ikleyn)

HI, It's been decades since I last worked in serious algebra but have hit a mathematical (answered by oscargut)

I am trying to find the interest rate "r" in this problem: "At a certain constant APR... (answered by scott8148)

please help me solve this equation. Suppose you deposit a principal amount of (p)... (answered by rfer)

If I invest $2000/year for 20 years (starting now) at an average rate of return of 8%... (answered by stanbon)

Help! Submitted these problems on Monday of thsi week and haven't receieved a response.... (answered by stanbon)