anser i give 100 pointes
1.6.2 Practice: Assignment
Practice
Math Foundations I Sem 2
Points Possible:30
Name:
Date:
Answer the following questions using what you've learned from this unit. Write your responses in the space provided.
1. (10 points) Hailey is fixing a gap in a wooden bookshelf. To fit well, she needs a piece of wood that measures 3.2 inches long.
A. She decides that as long as the length rounds to 3.2 inches, it will work. She has several pieces of wood to choose from. Which of the pieces of wood below can she use for her project?
3.26 inches, 3.209 inches, 3.18 inches, 3.30 inches, 3.09 inches
B. She later realizes that if the wood is longer than 3.2 inches, even by a tiny amount, she can't use it. Instead, she needs to find a piece of wood that rounds to 3.2 inches, but is no longer than 3.2 inches. Which piece of wood should she use?
2. (10 points) Christine works in a medical lab. She has several blood samples. The volume of each sample was measured, and they are shown below.
2.350 milliliters
2.285 milliliters
2.332 milliliters
2.299 milliliters
2.317 milliliters
A. Put the blood samples in order, from largest volume to smallest volume.
B. Christine needs to run a test on one of the blood samples, but the testing device can only hold 2.3 milliliters of blood. Which sample should she use if she wants to use as much blood as possible, without overfilling the testing device?
3. (10 points) Marsha weighed a piece of gold on a very sensitive scale. She cannot remember the measurement, but knows that the digits were 1, 5, 4, and 9.
A. She can only remember that the measurement, when rounded, was 1.5 grams. What are all the possible exact weights of the piece of gold?
The first digit must be 1. That leaves 5, 4, and 9. Write out all the possible weights:
B. If Marsha remembers that the weight rounded to 1.55, what are the possible weights of the piece of gold?
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