the wavelength of blue light in a spectrum is about 0.0000005 meters. which number best approximates this length as a power of ten

1. what is the measure of ∠abc? what is the measure of ∠abd?

Astandard deck of cards contains 52 cards. one card is selected from the deck. (a) compute the probability of randomly selecting a seven or king. (b) compute the probability of randomly selecting a seven or king or jack. (c) compute the probability of randomly selecting a queen or spade.

You have 17 cats that live in houses on your street, 24 dogs, 3 fish, and 4 hamsters. what percent of animals on your block are dogs?