Posted by **Chase** on Thursday, September 13, 2012 at 3:46pm.

1. (6.0 x 10^5) x (3.0 x 10^4) =

a. 18 x 10^20

b. 18 x 10^9

c. 1.8 x 10^20

d. 1.8 x 10^9

2. (5 x 10^-2) ÷ (2 x 10^3) =

a. 2.5 x 10^-5

b. 2.5 x 10^-1

c. 25 x 10^1

d. 25 x 10^2

3. (2.56 x 10^6) x (3.56 x 10^2) =

a. 9.1136 x 10^12

b. 91.136 x 10^8

c. 9.1136 x 10^8

d. 91.136 x 10^12

4. In a recent year, the population of California was about 2.52 x 10^7 people. Its land area is about 4.05 x 10^5 km^2. What was the average number of people per square kilometer?

a. 0.62 x 10^5

b. 6.2 x 10^1

c. 0.62 x 10^14

d. 6.2 x 10^9

- Math -
**Chase**, Thursday, September 13, 2012 at 3:50pm
My answers are

1. d

2. c

3. b

4. a

- Math -
**Chase**, Thursday, September 13, 2012 at 3:56pm
Can any body cheack my answers

- Math -
**Dan**, Thursday, September 13, 2012 at 4:21pm
1. b

2. c

3. c

4. a

- Math -
**Chase**, Thursday, September 13, 2012 at 4:23pm
they are all wrong

- Math -
**Kelly**, Wednesday, November 14, 2012 at 12:57pm
1.d

2.a

3.c

4.b

- Math -
**Kid**, Friday, September 19, 2014 at 11:06pm
^^Kelly is correct:

1. D

2. A

3. C

4. B

- Math -
**Joe :)**, Tuesday, October 7, 2014 at 1:08pm
Keep the chain going! both kid and kelly are correct!

1.D

2.A

3.C

4.B

- Math -
**haylee **, Wednesday, October 8, 2014 at 6:50pm
Kelly, Kid, and Joe are correct

1. D

2. A

3. C

4. B

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