Warm-up December 5, 2016 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?
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
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