Chapter 9 - Assessment

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Multiple Choice
Identify the choice that best completes the statement or answers the question.

Evaluate the expression.

a.	–243	c.	–15
b.	–125	d.	243

a.	–256	c.	128
b.	192	d.	384

a.	480	c.	192
b.	8	d.

a.	256	c.	65,536
b.		d.	1,024

Simplify the expression. Write your answer as a power.

a.		c.
b.		d.

a.		c.
b.		d.

a.		c.
b.		d.

a.		c.
b.		d.

a.		c.
b.		d.

10.

a.		c.
b.		d.

11.

a.		c.
b.		d.

12.

a.		c.
b.		d.

13.

a.		c.
b.	6	d.

Evaluate the expression.

14.

a.	15	c.
b.	–15	d.	–1

15.

a.	–3	c.
b.		d.	3

Write the number in standard form.

16.

a.	0.00089	c.	0.0000089
b.	0.000089	d.	0.000445

17.

a.	413,800,000	c.	4,138,000,000
b.	41,380,000	d.	3,310,400,000

Multiply. Write your answer in scientific notation.

18.

a.		c.
b.		d.

19.

a.		c.
b.		d.

Short Answer

Carbon-14 dating is used by scientists to determine the age of a sample. The amount C (in grams) of a 50-gram sample of carbon-14 remaining after t years is represented by the equation

a. Use a calculator to find the amount of carbon-14 that will remain after 700 years.
b. What percent of the original amount will remain after 700 years?