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

Imagine a new pasture with grass growing on it. every day after the seeds have germinated, the number of blades of grass in the pasture triples. after 18 days, the entire pasture is completely covered in grass. how many days did it take for the pasture to be one-third covered in grass?

Which of the following is true for the relation f(x)=2x^2+1

Sketch one cycle if the cosine function y=2cos2theta