Interest
P = $1,100, r = 1% per month, t = 5 months
What is the total interest in dollars?
I = Prt
I = Interest amount
P = principal (original value)
R = interest rate
T = time period
$55
Find the range of this data set:
8, 6, 7, 5, 6, 2, 5, 9, 9, 4, 5
Range = maximum - minimum value
7
28 x 42 = ?
1176
Johnathan bought 1 bag of flour at $7.50. He had a store coupon for $0.79. What was the final price of the flour?
$6.71
You were able to get a job at the university dining hall making $15 an hour. If you work 20 hours a week, how much money would you make in a year before taxes?
$15,600
$450 = $2500(r)(6 months)
R =? (in % form)
I = Prt
I = Interest amount
P = principal (original value)
R = interest rate
T = time period
R = 3%
Find the quartiles for the given data:
5, 32, 9, 11, 10, 15, 21, 8
Q1: 8.5
Q2: 10.5
Q3:18
What is the term for the solution of an addition, subtraction, multiplication, and division problem?
Sum
Difference
Product
Quotient
Feanna wants to buy a dress that is $75 and is on sale for 15% off. She also wants to buy a pair of heels to match that cost $20.50 and are on sale for 10% off.
What is the total cost of the outfit?
$82.20
You just got a 2 bedroom, 2 bathroom apartment with 3 friends. If rent costs $3,000 and utilities costs $200, what would the monthly cost per person be if the costs are split equally?
~$800/month per person
Glen received a $2,250 loan from a bank. After six months, he paid back $2,295 and closed the loan. Find the rate of interest
Use I = PRT
I = amount - principal
P = initial value
R = interest rate
T = time period in years.
Interest = Amount - Principal
I = 2295 - 2250
I = 45
Time period is 6 months = 1/2 years
I=PRT, substitute in values.
45 = 2250(r) (1/2)
45 = 1125 r
Divide both sides by 1125
r = 0.04, convert to percentage by multiplying by 100.
4%
Find the mean, median, and mode of this data set:
8, 6, 7, 5, 6, 2, 5, 9, 9, 4, 5
Mean: 6
Median: 6
Mode: 5
PEMDAS – What does it stand for?
Calculate the following:
6 + 2(5+3)/(3 x 2)
Simplify and leave as an improper fraction.
Parenthesis first: (5+3) = 8, (3x2) = 6
6 + 2(8)/(6)
Multiplication & division left to right.
6 + 16/6
Simplify improper fraction -- 8/3
Add 6 -- need a common denominator.
18/6 + 8/3 = 26/3
Miranda and David are celebrating their child’s third birthday.The bill came to $190.76. The food and service was excellent, so they decided to leave a 25% tip. How much of a tip will they leave and how much is their total?
Tip = $47.69
Total = $238.45
Congratulations! You were just accepted to UW-Madison! You received your financial aid package, and UW-Madison will offer you $5,000 per semester in scholarships.
If one YEAR at UW-Madison costs $30,644, what will your net price be per SEMESTER after your financial aid?
$10,322 per semester after aid
You invest $10,000 at an annual interest rate of 7%, compounded continuously, for 8 years. What will the total amount be after 8 years?
Use: PERT formula
A = P x e^rt
Round to the nearest hundredth.
P = 10,000
r = 7% = 0.07
t = 8 years
Plug in exponential rate
A = 10,000 x e^(0.07*8)
A = 17,506.72
Asher is catching bugs for an insect collection.
On Monday he collects 10 insects.
On Tuesday he collected 14 insects.
On Wednesday he only caught 1 insect.
On Thursday he caught the same number as he did on Monday.
On Friday he caught 5 insects.
How many insects did he catch on average?
8 insects on average
Use the Pythagorean Theorem: a² + b² = c².
You place a ladder that is 16.5 ft against a tree that measures 14 ft high. How far is the ladder placed in ft away from the base of the tree?
Round to the nearest hundredth and with units.
Substitute 14 for b & 16.5 for c.
Simplify: 14² = 196 & 16.5² = 272.25
a² + 196 = 272.25
Subtract 196 from both sides -- 272.25 - 196 = 76.25
a² = 76.25
Take the square root of both sides = 8.73 ft.
You plan to buy a package of pens. A 20 ball point pen package costs $3.50, a 30 ball point pen package costs $4.95 and a 40 ball point pen package costs $6.12.
What is the unit price of each package per pen?
BONUS: What is the best package to buy?
20 pens = $0.18/pen
30 pens = $0.17/pen
40 pens = $0.15/pen
Best Package: 40 pens
A student has $300 as “fun” money every month. They spend $15 on Netflix, $10 on music, and $25 on a gym membership. What percentage of their budget is spent on these subscriptions?
16.7%
On July 1 Eileen Anders deposited $550 in a savings account at Mat Savings and Loan Association. At the end of December, her interest was computed at an annual rate of 4.3%. How much interest did her money earn?
BONUS: After interest, how much is in her savings account?
$141.90
BONUS: $691.90
You and your roommates are drawing straws to assign chores for the week. There are 8 different chores: dishes, mopping, groceries, vacuuming, sweeping, dusting, taking out the trash, and cleaning the bathroom. You HATE doing the dishes and cleaning the bathroom.
What is the probability of you NOT getting those options?
75%
You want to buy a new laptop for school and are down to two options. Both options are the most recent model and in the color you want.
One is available at your University for $735 and one is available at a local technology store for $636. Both have a 5% sales tax. The one at school is on sale for 15% off the final price after tax and an additional 2% off for school membership. The one at the store has a discount for 5% off the final price.
Which deal is better?
BONUS: How much is the difference?
Technology store has a better deal
Technology store final price: $634.41
University store final price: $642.87
Difference = $8.46
You go grocery shopping and your total comes to $98.73. You have a coupon for 10% off your total transaction. You also have a $50 cash bill that you use. How much is left to pay with a card?
Round up to the nearest hundredth.
$38.86
The 50/30/20 rule suggests that 50% of your income should go to “Needs,” 30% should go to “Wants,” and 20% should go to Savings.
If you make $2,500 a month (after tax), how much money can be spent on each?
Needs
Wants
Savings
Needs: $1250
Wants: $750
Savings: $500