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IM: 7.4.15: Error Intervals (Practice)

Last updated 11 months ago

9 questions

Jada measured the height of a plant in a science experiment and finds that, to the nearest \frac{1}{4} of an inch, it is 4\frac{3}{4} inches.

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Question 1

1.

What is the largest the actual height of the plant could be?

Question 2

2.

What is the smallest the actual height of the plant could be?

Question 3

3.

How large could the percent error in Jada’s measurement be?

The reading on a car’s speedometer has 1.6% maximum error. The speed limit on a road is 65 miles per hour.

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Question 4

4.

The speedometer reads 64 miles per hour. Is it possible that the car is going over the speed limit?

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Question 5

5.

The speedometer reads 66 miles per hour. Is the car definitely going over the speed limit?

Question 6

6.

Water is running into a bathtub at a constant rate. After 2 minutes, the tub is filled with 2.5 gallons of water. Write two equations for this proportional relationship. Use w for the amount of water (gallons) and t for time (minutes). In each case, what does the constant of proportionality tell you about the situation?

Question 7

7.

Noah picked 3 kg of cherries. Jada picked half as many cherries as Noah. How many total kg of cherries did Jada and Noah pick?

3+0.5 

3-0.5 

(1+0.5)\cdot3 

1+0.5\cdot3 

Here is a shape with some measurements in cm.

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Question 8

8.

Complete the table showing the area of different scaled copies of the triangle.

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Question 9

9.

Is the relationship between the scale factor and the area of the scaled copy proportional?