Simple interest
How do we know that a problem is solved with Simple interest formulas?
It says "simple interest" or it doesn't say "compound interest" or it doesn't say anything, just mentions an interest rate
How do we know that a problem is solved with Commercial discount formulas?
It mentions that interest is charged in advance or mentions the amount actually received or mentions the words "discount", "cash value"
How do we know that a problem is solved with Compound interest formulas?
It says the word "compound" when describing the interest rate, sometimes "compounded" + frequency when it's capitalized
How do we know that a problem is solved with Annuities formulas?
It mentions periodic payments
Who founded Amazon?
Jeff Bezos
Before the teacher finishes counting down to zero, mention the formulas used for Simple interest problems.
I=Prt, A=P+I
Before the teacher finishes counting down to zero, mention the formulas used for Commercial discount problems.
D=Adt, CV=A-D
Before the teacher finishes counting down to zero, mention the formulas used for Compound interest problems.
A=P(1+r)^n, A=P(1+r/n)^(nt)
Before the teacher finishes counting down to zero, mention the formulas used for Annuities problems.
P=(R(1-(1+i)^-n))/(i), A=(R((1+i)^n - 1))/(i)
What is Batman’s secret identity?
Bruce Wayne
From the main formula, clear the rate and the time.
r=I/(Pt), t=I/(Pr)
From the main formula, clear the discount rate.
d=D/(At)
From the capitalized compound interest formula, clear the principal.
P=A/((1+r/n)^(nt))
If the problem asks for cash price of a car or a property, what formula do you use?
P=(R(1-(1+i)^-n))/(i)
What fictional town does Spongebob Squarepants live in?
Bikini Bottom
Sarah deposited $40,000 into a savings account. After 120 days, she had a total of $48,000. What rate of simple interest per ordinary year did she receive? Round to the nearest hundredth.
60.83%
Olivia requests a credit for $50,000 to renovate her office with a 12-month term, and interest is charged in advance. The annual interest rate is 8%. Find the discount and the cash value.
D=$4000, CV=$46,000
Find the amount at the end of 5 years on an account that pays 10.5% compound interest. The invested principal was $120,000.
$197,693.61
Ross bought a car without giving any down payment and paying 48 monthly fees of $3,200. If the credit had an annual interest rate of 9% compounded monthly, find the cash price of the car.
$128,591.30
In what year was YouTube created?
2005
Emma invested $6,000 in a bond at a yearly simple interest rate of 3.2%. She earned $768 in interest. How long was the money invested?
4 years
Lucas requests a credit of $80,000 to renovate his business with a 15-month term, and interest is charged in advance. The annual interest rate is 9%. Find the discount and the cash value.
D=$9000, CV=$71,000
Find the initial investment with which Daniel opened an account that pays 12.8% of interest compounded quarterly, if after 6 years he has an amount of $800,000.
$375,644.69
Jason bought a motorcycle without giving any down payment and paying 36 monthly fees of $1,800. If the credit had an annual interest rate of 7% compounded monthly, find the cash price of the motorcycle.
$58,295.64
What was the first major motion picture to be shot on the open ocean?
Jaws