Number Quiz - Weebly



Name _____________________________ Date __________________

Chapter 1-2 Quiz Review

Directions: Unless otherwise stated, express answers exactly or to 3 significant figures.

1. State the number of significant figures for each number.

a. 9.8032 b. 22.0 c. 220

2. Let m = 6.0 x 103 and n = 2.4 x 10-5. Express each of the following in the form[pic]

a. n2

b. m/n

3. Consider the numbers 5, 0.5, and – 5, and π. Complete the table below, showing which of the following number sets, Q, N, R, and Z these numbers belong to. Place a check if the number belongs to the set and place an “X” if the number does not belong to the set. One is done for you.

| |Q |N |Z |R |

|5 | | | | |

|0.5 | | | | |

|-5 | | | | |

|π | | | | |

4. Find the percentage error if 12 000 is used as an approximation to 11 565.

5. If a = 78.3, b = 0.32 find the value of 4a2 + ab, giving the answer

a. exactly;

b. correct to 3 significant figures;

c. correct to 2 decimal places;

d. to the nearest whole number;

e. in the form [pic]

6. Bob invests 600 EUR in a bank that offers a rate of 2.75% compounded annually. The interest is added on at the end of each year.

a) Calculate how much money Bob has in the bank after 4 years.

b) Calculate the number of years it will take for the investment to double.

Ann invests 6000 USD in another bank that offers interest compounded annually. Her investment will double in 20 years.

c) Find the rate that the bank is offering.

d) Instead of investing, Ann decides to go on European Trip with her money! She needs to exchange her dollars to Euros. The exchange is 1 USD = 0.89 Euro and the banks takes a commission of 2.5%.

a. Calculate the banks commission.

b. Calculate how much Euro Ann takes with her on vacation.

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