On monday, stock xyz opened at $8.84. on friday, it closed at $10.12. what is the rate of change of stock xyz for this particular week? a. 10.1% b. 8.9% c. 1.2% d. 12.2%

p = amount of change in price

p = (final amount) - (starting amount)

p = 10.12 - 8.84

p = 1.28

The stock increased by $1.28

Divide the value of p over the original amount 8.84

(amount of change)/(original amount) = p/8.84 = 1.28/8.84 = 0.144796

Convert 0.1447 to percent form to get 14.4796% which rounds to 14.5%

Unfortunately 14.5% isn't listed. I think your teacher made an typo when s/he made the problem.

1) c 2143.6 cm

2) c 113.0 m

3) a 33.5 ft

4)   d 2 cm

5) c 20 mm

6) 180 in

7) d 120 ft