# Math 115 Week 6 questions

1) A new car depreciates an average of 22% in its first year of use. If the car was worth $16,000 when it was new, what will the car be worth after 1 year?

2) A state sales tax rate is 4.8%. If the tax on a purchase was $23.76, what was the price of the purchase?

3) Ms. Jefferson has been given a loan of $20,000 for 1 year. If the interest charged is $800, what is the interest rate on the loan?

4) Write 58% as a fraction or a mixed number.

5) 260 is 40% of what number?

6) On the blueprint of Lauren's new office building, the scale is 3 in. equals 8 ft. What will be the actual length of Lauren's office if it measures 6 in. long on the blueprint?

7) Are these two rates of rainfall equivalent?

1.2 inches of rain in 5 hours

and

2.1 inches of rain in 8 hours

8) A chemist has 400 milliliters (mL) of solution that is 21% acid. How many milliliters of acid are in the solution?

9) What two whole numbers is between? Explain your thinking.

10) Complete the statement.

35 gal = ________ L

Round to the nearest whole L

11) Find the missing length of the right triangle.

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#### Solution Preview

Please find the solutions attached herewith.

These are some of the questions off of my test that I am having trouble with. Can you please show me how you get the answers?....I need to know so I can hopefully learn correctly how to work these types of problems out. Thank you.

1) A new car depreciates an average of 22% in its first year of use. If the car was worth $16,000 when it was new, what will the car be worth after 1 year?

Solution:

Depreciated price = 16000 - 22% of 16000

= 16000 - 0.22*16000

= 16000 - 3520

= $12480

2) A state sales tax rate is 4.8%. If the tax on a purchase ...

#### Solution Summary

Step-by-step solutions to all the fractions and percentages problems are provided.