Use scale factors and unit rates in proportional relationships to solve ratio and percent problems.
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Q 1/2
Score 0
Joshua uses his thermometer and finds the boiling point of ethyl alcohol to be 75 degrees Celsius. He looks in a reference book and finds that the actual boiling point of ethyl alcohol is 80 degrees Celsius. What is his percent error?
30
5%
6.67%
6.25%
Q 2/2
Score 0
An object has a mass of 35.0 grams. On Charlie's balance, it weighs 34.85 grams. What is the percent of error on Charlie's balance?
30
15%
0.43%
0.15%
2 questions
Q.
Joshua uses his thermometer and finds the boiling point of ethyl alcohol to be 75 degrees Celsius. He looks in a reference book and finds that the actual boiling point of ethyl alcohol is 80 degrees Celsius. What is his percent error?
1
30 sec
NC.7.RP.3
Q.
An object has a mass of 35.0 grams. On Charlie's balance, it weighs 34.85 grams. What is the percent of error on Charlie's balance?
