Ratio & Rates
A ____________________ is a comparison of two quantities by division.
what is a ratio
Jacob bought one bulb of elephant garlic for $2. How many bulbs can Stephanie buy if she has $12?
What is 6
You can find the amount of sales tax by using the following formula:
Amount of sales tax=price×rate of sales tax
A bag of candy has 40 white candies and 30 black candies. What is the ratio of black candies to the total number of candies in the bag?
What is 3:7
Chemical symbol for gold
What is Au
There are three different ways that we can write ratios. What are they?
Fraction, using a colon, using the word “to”
The money used in South Africa is called the Rand. The exchange rate is 7 Rand for $1. Find how many dollars you would receive if you exchanged 21 Rand.
What is $3
Emily bought a jacket for $85. If the sales tax is 7.5%, find the total cost of the jacket.
What is $91.38
First , find the amount of sales tax.
7.5% of $85=0.075×$85=$6.375
Then, add the original price of the jacket and the sales tax.
$85+$6.38=$91.38
A store sells 4 bottles of juice for $9.40. At that rate, what is the cost of one bottle of juice?
What is $2.35 per bottle
Type of radiation that can be blocked by paper
What is alpha
Two ratios that have the same value are
What is equivalent ratios
A Frame is 6 in tall and 8 in wide. If it is reduced to a width of 4 in then how tall will it be?
What is 3 inches
Mr. and Mrs. Green and their four children went out to dinner. The cost of the meal was $72. The restaurant added a tip of 18% to the bill. What was the total cost of the dinner?
.
First, find the amount of the tip.
18% of $72=0.18×$72=$12.96
Then, add the cost of the meal and the tip.
$72+$12.96=$84.96
The total cost of the dinner, with tip, was $84.96
The ratio of boys to girls in Hannah’s class is 6:7. If there are 21 girls in Hannah’s class, find the total number of students in Hannah’s class.
What is 39
Since there are 21 girls, I know the ratio is being changed to 18:21, multiplying both parts by 3. Therefore, there are 18 boys, so there are 18 + 21 = 39 students.
Uranium emits _____ Radiation
Alpha
When a rate is simplified so that it has a _________________________, it is called a
What is a unit rate?
A man can make 12 birdhouses in 8 hours. How many hours will it take him to make 30 birdhouses?
What is 20
12=8
30=x
30x8=240 /12=20
Brandon bought a T-shirt for $8.99 and a pair of shorts for $11.99. If the rate of sales tax is 7%, how much did he spend in total?
What is $22.45.
$8.99+$11.99=$20.98
$20.98×0.07=$1.47
$20.98+$1.47=$22.45
1. On his bicycle, Paul can ride 20 miles in 2.5 hours. Find Paul’s unit rate and use it to determine how far he could travel in 3.5 hours. Show or explain your work.
What is 28
Divide 20 by 2.5 and get 8 miles per hour. Then, to find out how far he could travel in 3.5 hours, I multiply the unit rate by 3.5 and get 28 miles.
atomic number of mercury
What is 80
Alex can run 24 miles in 3 hours. What is his average speed in miles per hour?
8 miles per hour
A cookie recipe for 5 dozen cookies calls for 4 cups of flour. How much flour is needed to make 90
cookies?
What is 6 cups
5x12=60 cookies = 4 cups
90 cookies = x cups
90x4=360 /60 =6
Find the total amount on a $65.00 item with 5% sales tax assessed.
$65.00×0.05=$3.25
$65.00+$3.25=$68.25
The answer is the total cost of the item, with tax, is $68.25.
The Smith family goes out for dinner. The total bill is $48.50. They leave a 14% tip. determine the actual amount of their tip.
What is $6.79
$48.5 × 14% = $6.79
Subatomic particle with a positive charge
what is Protons