Warm-up December 7, 2015 A Day that will live in Infamy

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Presentation transcript:

Warm-up December 7, 2015 A Day that will live in Infamy On a map with a scale of one inch equals 20 miles, 2 cities are 6.5 inches apart. How many miles are the cities from each other? Harold walks ½ mile in 1/5 hour. What is his unit rate of speed? One 20 pound bag of fertilizer will cover 50 sq. ft. of lawn. How many bags are needed for a 2750 sq. foot lawn?

Compare Populations Box Plot Dot Plot Double Box Plot Double Dot Plot

Box Plot Lowest value (smallest number) Lower Quartile Median Upper Quartile Highest value (biggest number) Lose details It’s a summary of the data set.

Dot Plot It’s shown on a number line. Have all the details. Each number in the data set is shown.

Class work Compare Populations Chapter 7, Lesson 4 Pages 583 and 584 Problems 1 – 7

PERCENT CHANGE Formula: (End – Beginning )/ Beginning (End minus Beginning) divided by Beginning Then change to a % + = increase - = decrease From 25 to 75 From 50 to 25

Computer: $500; 30% markup Watch: $25.00; 50% markup Find the selling price for each item given the cost and the percent of markup or markdown. Computer: $500; 30% markup Watch: $25.00; 50% markup Ipad: $499.00; 20% markdown

SIMPLE AND COMPOUND INTEREST SIMPLE: $ * I * # of years Dollar amount times the interest rate (as a decimal) times the number of years COMPOUND: $ * I for year one, then new $ amount times I for year 2, then new $ amount times I for year 3, etc.

Find the simple interest to the nearest cent. $720 at 8% for 5 years $385 at 6% for 3 years $4250 at 9.25% for 10 years

$2200 at 5% for 2 years $3850 at 6% for 3 years Find the total amount in each account to the nearest cent (interest compounded annually). $2200 at 5% for 2 years $3850 at 6% for 3 years $1000 at 4% for 5 years