I actually did the assignment, I have a D though so I want to make sure I get everything right. Thank You.

1.

Simplify: 12·125.

A. 126

B. 1445

C. 1,500

D. 248,832

2.

Simplify: (94)2.

A. 96

B. 98

C. 916

D. 188

3.

Simplify: (15·20)5.

A. 1,500

B. 15·2025

C. 151·205

D. 155·205

4.

Simplify: −3(4x)2.

A. −48x2

B. −12x2

C. 12x2

D. 144x2

5.

Simplify: −k(−4j k2n2)3 (j4n)2.

A. −64j11k3n8

B. 64j3k3n2

C. 64j11k7n8

D. 256j11k8n3

6.

Simplify: .

A.

B.

C.

D.

7.

The United States has one of the lowest rates of cell phone usage in the industrialized world, at 85 cell phones per 100 people. (By contrast, Hong Kong has around 140 cell phones per 100 people.) If the U.S. population is about 302 million, what is the order of magnitude of cell phone use in the United States?

A. 105

B. 106

C. 107

D. 108

8.

Simplify: .

A. 82

B. 83

C. 84

D. 88

9.

Simplify: .

A.

B.

C.

D.

10.

Simplify: .

A.

B.

C.

D.

11.

Simplify: .

A.

B.

C.

D.

12.

Simplify: .

A.

B.

C.

D.

13.

A connection between a typical home computer and the Internet can download 107 bits of data per second. That could receive ten pages of your textbook in one second. A connection between a research university and the Internet can download 1010 bits per second. How many times more capacity does the university connection have than the home Internet connection?

A. 10 times

B. 100 times

C. 1000 times

D. 100,000 times

14.

Evaluate: 5−3.

A.

B.

C.

D.

15.

Evaluate: .

A. Undefined

B. 1.00

C. 0.24 approximately

D. 0.00

16.

Evaluate: (2−3)2.

A. Undefined

B.

C.

D.

17.

Evaluate: .

A.

B.

C.

D.

18.

Rewrite so that the result uses only positive exponents: .

A.

B.

C.

D.

19.

Rewrite so that the result uses only positive exponents: .

A.

B.

C.

D.

20.

A micron is a unit of measurement equal to 10-4 centimeters. An oval, one-celled organism called a paramecium typically measures 100 microns in length. If someone could persuade these little creatures to line up end-to-end, how may paramecia would be required to cover one centimeter?

A. 100

B. 1000

C. 10,000

D. 100,000