anonymous
  • anonymous
Match the information about interest earned with the principal amount invested. Remember the equation for calculating simple interest is I equals p times r times t . seventy-two dollars over 3 years at an interest rate of three percent sixty-six dollars over 2 years at an interest rate of three percent seventy-two dollars over 2 years at an interest rate of four percent seventy-two dollars over 3 years at an interest rate of two percent A. p equals nine hundred dollars B. p equals one thousand two hundred dollars C. p equals one thousand one hundred d
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
Mertsj
  • Mertsj
Did you try this?
Mertsj
  • Mertsj
the first one would be interest earned is 72, principal we have to find, rate is .03 and time is 3 years.
Mertsj
  • Mertsj
\[72=P(.03)(3)\]

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More answers

Mertsj
  • Mertsj
P=800
Mertsj
  • Mertsj
Why do you only have 3 answers for 4 problems?
anonymous
  • anonymous
I put the last one but it wont show it was ( D. p equals eight hundred dollars )
Mertsj
  • Mertsj
Can you try the next one and tell me what you get and I will check it.
anonymous
  • anonymous
66(.3)(2) i did this but i got 39.6 :\
Mertsj
  • Mertsj
\[66=P(.03)(2)\]\[\frac{66}{(.03)(2)}=P\] \[1100=P\]
anonymous
  • anonymous
am I adding the (.03) (2) together and then dividing it by 66?
Mertsj
  • Mertsj
No. Let's take some simpler numbers and see if you can understand. What if I have 12 = 2x Could you solve that? And how would you do it?
anonymous
  • anonymous
6 12 รท 2 = 6?
Mertsj
  • Mertsj
Yes. look at what I am going to draw.
Mertsj
  • Mertsj
|dw:1328200164853:dw|
Mertsj
  • Mertsj
So these equations that you have to solve are exactly like that.
Mertsj
  • Mertsj
do you have a calculator?
anonymous
  • anonymous
Yes
Mertsj
  • Mertsj
Write this down on a piece of paper; 66=P(.03)(2)
anonymous
  • anonymous
k
Mertsj
  • Mertsj
Now multiply .03 times 2
Mertsj
  • Mertsj
What did you get?
anonymous
  • anonymous
.06
Mertsj
  • Mertsj
So now write this: 66=P(.06)
anonymous
  • anonymous
k
Mertsj
  • Mertsj
Now divide both sides of the equation by .06 like I showed you in the drawing.
anonymous
  • anonymous
p = 1100
anonymous
  • anonymous
:D ahh i see
Mertsj
  • Mertsj
Very good. Now set up the next one and tell me how you set it up. NOT the answer, just the set-up.
anonymous
  • anonymous
ok
anonymous
  • anonymous
72 = P(.04)(2)
Mertsj
  • Mertsj
Perfect!! Now, can you solve it?
anonymous
  • anonymous
yes :D!
Mertsj
  • Mertsj
Great. Tell me what you get.
anonymous
  • anonymous
P = 800?
Mertsj
  • Mertsj
That's not what I got. You check your answer and I will check mine.
anonymous
  • anonymous
well i got 1800 = p but I did not know what to do with the (2) in 72 = P(.04)(2)
Mertsj
  • Mertsj
(.04)(2) means .04 times 2 so multiply them together first.
Mertsj
  • Mertsj
Then you should have 72=P(.08)
anonymous
  • anonymous
yes
Mertsj
  • Mertsj
Now divide both sides of the equation by .08
Mertsj
  • Mertsj
Like I showed you in the drawing.
anonymous
  • anonymous
p = 900
Mertsj
  • Mertsj
Bingo!!! Now try the last one.
Mertsj
  • Mertsj
And show me your setup
anonymous
  • anonymous
72 = P(.04)(2) .04 x 2 = .08 72 = P(.08) 1,900 = p that??
Mertsj
  • Mertsj
Well that is all perfect except when you divided both sides by .08 you must have hit a wrong button. So try the division part again.
Mertsj
  • Mertsj
Oh. just a minute. That is the same problem we just did.
anonymous
  • anonymous
oh you want the next?
Mertsj
  • Mertsj
Yes. The last problem.
Mertsj
  • Mertsj
The final problem in the list.
anonymous
  • anonymous
seventy-two dollars over 3 years at an interest rate of two percent 72 = P (.02)(3) 72 = P (.06) 1,200 = p
Mertsj
  • Mertsj
WOW!!! You are just too smart!
anonymous
  • anonymous
:D ty for teaching me!!!
Mertsj
  • Mertsj
yw
anonymous
  • anonymous
sorry i took so long to understand o.o
Mertsj
  • Mertsj
That's ok. We all have trouble with stuff. It's just not the same stuff for everyone.
anonymous
  • anonymous
thanks :)
Mertsj
  • Mertsj
yw

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