Fermi (Estimating)
Estimate the number of pencils in a classroom with 28 students if each has about 3 pencils.
About 84 pencils
How many outcomes if you flip 2 coins?
4
The aspect ratio 16:9 means for every 16 units of width, how many units of height?
what is 9
A teacher weights test as 60% and homework as 40%.This is called a ____ average?
what is a weighted average?
Which AQR concept helps you estimate huge quantities quickly?
What is Fermi Estimation?
In a school of 1,600 students, estimate the number of shoes in the building.
About 3,200 shoes
How many 3-digit PIN codes are possible using digit 0-9?
1,000
A 1920x1080 image is resized to half width. What is the new width?
what is 960 px?
A students has a test average 80 and homework average 100. Weighted average=0.6(80)+0.4(100).
what is 88
Changing the size of a picture without stretching uses what concept?
What is aspect ratio?
A gym holds 2,000 people. A picture shows the gym 60% full. Estimate the amount of people in the crowd.
About 1,200 people
A license plate has 3 letters and 3 numbers. How many possible plates can be made?
17,576,000
A 4x6 photo is enlarged to a width of 8.what height keeps the ratio?
what is 12?
A baseball player has at-bats: single (1 pt), double (2 pts), triple (3 pts), home run (4 pts). Total 20 at-bats, 30 total bases. What is his slugging percentage?
What is 1.500?
Selecting 3 toppings from a list of 10 uses what counting rule?
What is combinations?
One cubic foot can hold about 35 tennis balls. Estimate how many fit in 10 cubic feet.
About 350 balls
A combination lock needs 4 digits (0-9). Digits can repeat. How many combinations?
10,000
A tv is 55 inches diagonal with a 16:9 ratio. is the screen wider or taller?
what is wider?
A class grade = 30% quizzes, 50% tests, 20% projects. Scores: Q=70, T=90, P=80.
What is 83?
A weighted average always depends on ____.
What are weights (percentages)?
Estimate how many sheets of paper are 12 inch tall stack of paper if 500 sheets = 2 inches.
About 3,000 sheets
A password uses 4 letters (A-Z) and 2 numbers. How many passwords?
45,697,600
If an image shrinks to 25% of its original area, what happens to its dimension?
what is each dimension becomes 50%?
A store mixes 3 candies: 2 lbs at $5/lb, 4 lbs at $6/lb, 4 lbs at $10/lb. Weighted average cost?
What is $7.60/lb?
A baseball batting stat based on total bases divided by at-bats is called…
What is slugging percentage?