AnswersTN-Mathematical Reasoning for Decision Making SupplementAddition and Subtraction with Scientific Notation

Addition and Subtraction with Scientific Notation — Unit test Answers

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3

Luka and Anja each measured the height of their friend three times. Their friend is 59 inches tall. They recorded their measurements as shown.Luka:59 in., 58, in., 58 in.Anja:59.3 in., 59.6 in., 58.2 in.

A
Luka’s measurements are more precise and more accurate.
B
Anja’s measurements are more precise and more accurate.
C
Luka’s measurements are more precise, but Anja’s measurements are more accurate.
D
Luka’s measurements are more accurate, but Anja’s measurements are more precise.
5

Marta measured the temperature as 65°F. What is the margin of error?

A
60°F to 70°F
B
64°F to 66°F
C
64.5°F to 65.5°F
D
65.5°F to 66.5°F
7

According to the instruction manual, Sam's camera screen is 2.7 inches long. He measured its length using the two rulers shown. Which is true about the accuracy and precision of the rulers?

Question illustration
A
The measurement found using Ruler 1 is more accurate and more precise.
B
The measurement found using Ruler 2 is more accurate and more precise.
C
The measurement found using Ruler 1 is more accurate but less precise.
D
The measurement found using Ruler 1 is more precise but less accurate.
9

Alina measured a distance to be 2.18 miles. What is the margin of error?

A
2.1 miles to 2.2 miles
B
2.175 miles to 2.185 miles
C
2.185 miles to 2.195 miles
D
2.2 miles to 2.3 cm

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Addition and Subtraction with Scientific…