lesson 20
Suppose you borrow three hundred dollars for 3 years at a yearly simple interest rate of 3.4% What is the value of PRT?
P=300 R=0.034 P=3
The payment increases from 700 to 945 . What is the percent Increase?
35% increase
Yolanda asks a random sample of 50 students at her school what they do after school. Of those 50 students, 30 say they want to play sports. What is the percentage that wants to do sports?
60%
The students in a science class take a quiz before they start a new unit,the mean score is 3 and the MAD score was 1.8. Afetr the unit the kids take the quiz again, the mean score is 7.5 and the MAD is 1.5 suppose you plotted both of the scores would they over lap
no
Can an isosceles triangle have exactly one 9-in.. side length and a
33-in. perimeter? If so, is the triangle unique?
yes
Suppose you borrow four hundred dollars at a yearly simple interest rate of 3% for 3 months. What is the value that you would use for PRT?
P=400 R=0.03 T=1/4
Pillar has 40 shells in her collection. she goes to the beach nd collects 6 more shells in the morning and 3 more shells in the afternoon.What is the percent change in pillars collection from the start to the end
22.5 change
100 people go to a restaurant and have the choice to pick from a hot dog or a hamburger. If 36 people pick hot dogs, what is the percent that pick hamburgers?
64%
At a dog show, the mean weight of the Norfolk Terriers is 11.5 pounds with a MAD of 2. The mean weight of the Cairn Terriers is 13 pounds with a MAD of 1.8. Express the difference in mean weights as a multiple of the MAD for both dog breeds.
The difference between the means is .75 times the MAD for Norfolk Terriers and .83 times the MAD for Cairn Terriers
Which conditions result in a unique triangle
A 5-cm side between two right angles
B 5-cm side between a 90° angle and a 120° angle
C 5-cm side between a 30° angle and a 60° angle
D 30° angle, a 60° angle, and a 90° angle
c
Suppose a store puts a sale of 25% off. Is this a markdown or a markup?
It is a markdown
Last year an organization spent 500 on food for an event, 100 people attended, This year they plan for 120 people to attend the event. Food cost the same from this year to last year. What is the percent change from this year to last year?
20%
300 people visit a museum in one day, 100 people first see the dinosaur exhibit, and 100 people visit the inventions exhibit. What is the percentage of people who went to the space exhibit?
33%
There are 279 Grade 7 students and 225 Grade 8 students in Noor’s school. Noor asks a random sample of 25 students from each grade which night they plan to attend the school play. Can she expect more Grade 7 or Grade 8 students at the play on Friday night? About how many more?
noor should expect about 6 more 7th grade students then 8th grade students to attend the play on friday
Zahara draws a rectangle with sides that are 5 cm and 9 cm long. Adrian draws a parallelogram with sides that are 5 cm and 9 cm long and one right angle. Raúl claims that both shapes are the same quadrilateral. Is Raúl correct? Explain why or why not.
yea
Suppose you pay 7% tax on an item. What is the percent of the price of the item that you will pay?
107%
The original cost of a shirt is 40$ A school manager marks up the cost by 20% during the sale, the store manager marks down the price by 20%. What is the percent change from the original cost to the sale price?
4% decrease
10%
Suppose the data sets described below were plotted on dot plots. Which pair
of data sets would show the most visual overlap?
A Data set 1: mean: 40; MAD: 4Data set 2: mean: 40; MAD: 8
B Data set 1: mean: 30, MAD: 5
Data set 2: mean: 30, MAD: 6
C Data set 1: mean: 20, MAD: 4
Data set 2: mean: 20; MAD: 2
D Data set 1: mean: 10, MAD: 1
Data set 2: mean: 10, MAD:
B
Lamont wants to make a bookend in the shape of a triangle. He joins two pieces of wood that are 7 in. and 9 in. long at a right angle. Can a triangle with a right angle between a 7-in. and a 9-in. side exist? If so, is it unique?
yes
Jason earns a 9% commission on a 1000 dollar sale. how much is Jason´s commission?
90
Jasmine estimates it will take 8.5 hours to read a book, it actually took Jasmine 10 hours to read the book. What is the percent error in Jasmine´s estimate?
15%
500 people go to the store to get fruit in a week 200 go for a apple and 150 go for watermolan and the rest go for other fruits
30%
Bus drivers in a certain city take 25 random samples of the number of riders on
their routes during the day. Which inferences can you make based on these
samples? Select all that apply.
A On both routes, about 75% of the rides have more than 30 riders.
B The route B bus has a more consistent number of riders.
C On a given day, the route A bus is more likely to have fewer than 40 riders than the route B bus is.
D The typical number of riders is greater on a route A bus
than on a route B bus.
E The route A bus has between 30 and 55 riders more often than the route B bus does
A,B,D
Which conditions result in a unique quadrilateral? Select all that apply.
A: parallelogram with a right angle and one side with length 3 in.
B: rectangle with side lengths 2 ft and 3 ft
C: rhombus with a side 3 m long and a right angle
D: trapezoid with a right angle and side lengths 2 m and 6 m
E: square with a side that is 10 cm long
F: quadrilateral with side lengths 6 in., 7 in., 8 in., and 9 in
B,C,E