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EXP0NENTIAL FUNCTI0NS
heres a problem. i really need help asap.
B0B PUT $20 INTO A BANK ACCOUNT. EVeRY MONTH IT DOUBLES. IN 5 MONTHS, HOW MUCH $ WILL BE EARNED?
please show me how to get this answer!
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1 month- 20
2 month- 40
3 month- 80
4 month- 160
6 month- 320
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you have
1month - first month was 20$
2months - double it the second month 40$
3months - double it again 80$
4months- double it again 160$
5months- double it again 320$
i believe 320$ is the answer hun
-adrianna
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you make a chart 1-20 2-40 3-80 4-160 5-320 so he'll have 320 after 5 months. the exquation is has like a wierd equtaion because it is a parabola. but you can just make a table like the thing i made above: 1-20 2-40 3-80 4-160 5-320 (NOTE--first number is obviously months, 2nd is money)
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Alright. So when Bob put the $20 in, it was the start of month 1. At the start of month 2, it is 20*2, or 40 dollars. At the start of month 3, it is 40*2, or 20*4, which is $80.
With this, you can get is for 5 months by using the formula:
a*n^t
With a being the $20 he put it, the n being the amount of interes (Double), and the t being the time.
20*2^5
20*32
The rest is up to you.
I would be willing to show you how to get more answers if you wish, but I am not giving just answers.
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