1. 105,000,000 written in scientific notation would be:

a. 1.05 x 108
b. 10.5 x 108
c. 1.05 x 10-8
d. 10.5 x 107
2. 45,000 in scientific notation would be:

a. 4.5 x 104
b. 4.5 x 10-4
c. 45 x 103
d. 45 x 10-3
3. 7,600,000 in scientific notation would be:

a. 7.6 x 108
b. 7.6 x 10-6
c. 7.6 x 106
d. 76 x 105
4. 0.57 in scientific notation would be:

a. 0.57 x 10-7
b. 5.7 x 10-8
c. 5.7 x 108
d. 57 x 109
5. 0.36 in scientific notation would be:

a. 3.6 x 10-5
b. 36 x 10-6
c. 3.6 x 105
d. 36 x 106

The line y = x + passes through (−3, 7) and is parallel to y = 4x − 1.

Suppose there is a simple index of three stocks, stock abc, stock xyz, and stock qrs. stock abc opens on day 1 with 4000 shares at $3.15 per share. stock xyz opens on day 1 with 5000 shares at $4.30 per share. stock qrs opens on day 1 with 6000 shares at $4.60 per share. the price of stock abc on day 8 begins at $3.50. the price of stock xyz on day 8 begins at $3.90. stock qrs opens on day 8 with a price of $4.50 per share. assume that each stock has the same number of shares that it opened with on day 1. what is the rate of change of this simple index over 1 week?

Fractions can be added and subtracted only if they're fractions. a. like b. proper c. improper d. unlike