8. One nanometer is about 0.00000003937 of an inch. What is this number in standard notation?
a. 3.937 x 10^-8
b. 3.937 x 10^8
c. 3.937 z 10^-7
d. 3.937 x 10^7
9. What is 3/8 written as a decimal?
a. 2.33333...
b. 0.375
c. 0.33333...
d. 2.667
10. According to the 2010 census data, the populaton of Texas was about 2.5 x 10^7 people. The land area of Texas is about 2.6 x 10^5 m^2. What is the average number of people per square mile?
a. 0.96 x 10^2
b. 9.6 x 10^1
c. 0.96 x 10^35
d. 9.6 x 10^12
11. Based on the 2010 census, the population of Georgia was 9.6 x 10^6. Which state has a larger population?
a. Alaska: 7.1 x 10^5
b. New York: 1.9 x 10^7
c. Wyoming: 5.6 x 10^5
d. Idaho: 1.5 x 10^6
12. Which of the following is an example of a integer?
a. square root of 5
b. 3
c. 1/3
d. 0.8
15. What is the solution to 2 6/7 / 2/14
14 answers
9. b.
10. Density=2.5*10^7People/ 2.6*10^5m^2=
0.96*10^2 = 9.6*10^1 People/m^2.
Density=96People/m^2*2.56*10^6m^2/1mi^2=
2.5*10^8People/mi^2.
11. b. New York = 1.9*10^7 = 19.*10^6.
12. b.
15. (2 6/7)/(2/14) =
(20/7)/(1/7) = 20/7 * 7/1 = 20/1 = 20.
NOTE: 2/14 = 1/7.
2.d
3.a
4.d
5.b
6.c
7.b
8.a
9.b
10.b
11.b
12.b
13.d
14.b
15.c
1.b
2.d
3.a
4.d
5.b
6.c
7.b
8.a
9.b
10.b
11.b
12.b
13.d
14.b
15.c
12 answers