Compound Interest
If you invest $1000 in a account that pays 4% interest compounded monthly, how much money will you have in the account after 1 year?
$1040.74
more than
Solve for x (all values):
2x^2-18=0
x=\pm3
The x-coordinate of the vertex of a parabola
y=ax^2+bx+c.
x=-b/(2a)
If you invest $1000 in an account that pays 4% interest compounded monthly, how much money will you earn in interest after 5 years?
$221
What is the monthly payment on a 10 year $15,000 loan at 4% APR?
$152
Solve for x (all values):
x^2-3x-4
x=-1,4
When the vertex is a maximum of
y=ax^2+bx+c.
a<0
Approximately how long will it take to double an investment earning 4% interest?
72/4=18\ years
How much of a home loan can I afford so that my monthly payment is $700 month for 30 years at 4%?
$146,623
What is the quadratic formula?
x=(-b\pm\sqrt{b^2-4ac})/(2a)
When does a missile traveling the below path reach its maximum height?
h(t)=-2t^2+12t+24
t=3
How long will it take for an investment in an account that pays 4% APY to triple?
ln(3)/ln(1.04)=28\ years
If I take a $20,000 10-year loan for 4%, how much in interest do I end up paying back?
$4,299
Solve for x (all values):
x^2-3x+1
(3\pm sqrt(5))/2
If the Gazebo charges $4 for a burrito, they sell 100 per day. For each additional dollar, they sell 10 less. How much should they charge to maximize profit?
$7