AnswersWV-Algebra I CRDimensional Analysis

Dimensional Analysis Answers

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The maximum height of a vehicle that can safely pass under a bridge is 12 feet 5 inches. A truck measures 162 inches in height. Which best explains whether or not the truck can pass safely under the bridge?

A
The truck can pass safely under the bridge. The truck is 13 inches shorter than the maximum height.
B
The truck cannot pass safely under the bridge. The truck is 13 inches taller than the maximum height.
C
The truck can pass safely under the bridge. The truck is 12 inches shorter than the maximum height.
D
The truck cannot pass safely under the bridge. The truck is 12 inches taller than the maximum height.
2
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What did you include in your response? Check all that apply.

A
The rounded conversion will not give an accurate answer based on the limitations of the problem.
B
Using the more accurate conversion factor will give an answer that can then be rounded to 2 decimal places.
3

Which expression can be used to convert 100 USD to Japanese yen?

A
Option
Option A
B
Option
Option B
C
Option
Option C
D
Option
Option D
4

Two competing gyms each offer childcare while parents work out. Gym A charges $9.00 per hour of childcare. Gym B charges $0.75 per 5 minutes of childcare. Which comparison of the childcare costs is accurate?

A
Gym B charges $1.05 less per hour than Gym A.
B
Gym B charges $1.50 less per hour than Gym A.
C
Gym B charges $5.25 less per hour than Gym A.
D
Gym B and Gym A charge the same hourly rate for childcare.
5

A store manager timed Janette to see how long it would take her to fold and put away a sweater, a shirt, a pair of pants, and a scarf. It took her 26.1 seconds for the shirt, 24.3 seconds for the sweater, 32.8 seconds for the pants, and 18.2 seconds for the scarf. What was the average time it took Janette to fold and put away all four items?

A
25 seconds
B
25.4 seconds
C
25.35 seconds
D
26.1 seconds
6

⇒ 30

Answer:

62580

7

A white-tailed deer can sprint at speeds up to 30 miles per hour. American bison can run at speeds up to 3,520 feet per minute. Which animal is faster and by how many miles per hour? There are 5,280 feet in one mile.

A
A deer is 10 miles per hour faster than a bison.
B
A bison is 10 miles per hour faster than a deer.
C
A deer is 0.66 miles per hour faster than a bison.
D
A bison is 0.66 miles per hour faster than a deer.
8

Mitchell travels from the US to Canada, where he exchanges 150 US dollars for Canadian dollars. He then spends 20 Canadian dollars, returns to the US, and exchanges the remaining money back to US dollars. How many US dollars does Mitchell have remaining?

A
129.46
B
130.00
C
130.59
D
134.62
9

The Ruiz family is exchanging euros for US dollars. The exchange rate is 1 euro equals 1.35261 USD. Since the Ruiz family knows that USD are stated to the nearest hundredth of a dollar, they used the conversion ratio. Will this give the Ruiz family the correct exchange? Explain.

Question illustration
Answer:

No. Using 1.35 USD per euro rounds the exchange rate too early and may give an inaccurate exchange. Use the full rate, 1.35261 USD per euro, for the conversion, then round the final amount to the nearest hundredth.

10

What errors did the coach make? Check all that apply.

A
He used an incorrect time ratio converting hours to minutes.
B
His units do not cancel.
C
He used an incorrect distance ratio converting miles to feet.
D
He incorrectly concluded that she is not running fast enough.
E
He cannot determine her average rate in miles per hour after only 15 minutes.

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