Homework Help: Math

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

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