The wavelength of yellow light in a spectrum is about 0.00002 inches. Which number best approximates this length as a power of 10?
A. 2 x 105
B. 2 x 10-4
C. 2x 10-5
D. -2 x 105

34 cup. a serving of vegetable soup is 23 cup. the restaurant sold 20 servings of chicken noodle soup and 18 servings of vegetable soup. how many more cups of chicken noodle soup did they sell than cups of vegetable soup?

Can someone me with #s 8, 9, and 11. with just one of the three also works. prove using only trig identities.

Susie wants to take her friend out for lunch.she wants to spend $9.75 each person. how much will she spend in all.