Question
Your Aunt will give your $1,ooo if you invest it for 10 years in an account that pays 20% interest compounded annually. That is, at the end end of each year your interest will be added to your account and invested at 20%.
What will your account be worth at the end of 10 years? How much interest will you earn during the 10t year?
(1+r)^n = where r is the interest stated as a decimal (in this case it would be 0.20) and n is the number of years, will give you the value of $1. Multiply that by the number of dollars to be invested. I hope this helps. Post your work if you have trouble.
3=6-42/
wats the answer for -3u(5u+7)=-2
jennie, you should post this as a separate question, otherwise we'll miss it.
We have -3u(5u+7)=-2
If you distribute the -3u over the other term we get
-15u^2-21u = -2
Now bring the -2 to the left side
-15u^2-21u+2=0
Now we need to find the roots of this equation. We can either try to factor the equation of we can use the quadratic formula. I think the Q.F is the way to go here.
we have x= 21/(2*-15) +/-sqrt(21^2 - 4(-15)2))/(2*-15)
Thus x=-21/30 -/+ sqrt(561)/30
or x = (-21 +/-sqrt(561))/30 if I did the arithmetic correctly.
I'll let you finish the arithmetic and verify the solution.
What will your account be worth at the end of 10 years? How much interest will you earn during the 10t year?
(1+r)^n = where r is the interest stated as a decimal (in this case it would be 0.20) and n is the number of years, will give you the value of $1. Multiply that by the number of dollars to be invested. I hope this helps. Post your work if you have trouble.
3=6-42/
wats the answer for -3u(5u+7)=-2
jennie, you should post this as a separate question, otherwise we'll miss it.
We have -3u(5u+7)=-2
If you distribute the -3u over the other term we get
-15u^2-21u = -2
Now bring the -2 to the left side
-15u^2-21u+2=0
Now we need to find the roots of this equation. We can either try to factor the equation of we can use the quadratic formula. I think the Q.F is the way to go here.
we have x= 21/(2*-15) +/-sqrt(21^2 - 4(-15)2))/(2*-15)
Thus x=-21/30 -/+ sqrt(561)/30
or x = (-21 +/-sqrt(561))/30 if I did the arithmetic correctly.
I'll let you finish the arithmetic and verify the solution.
Answers
I don't get it
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