Which equation is not an identity? a.) tan(-t) = -tan t b.) tan t(csc t + cot t) = sec t + 1 c.) sin tcot t = cos t d.) cos^2t - sin^2t = -1

Answer this question, only if you know the answer. 30 points and brainliest!

The random variable x is the number of occurrences of an event over an interval of ten minutes. it can be assumed that the probability of an occurrence is the same in any two-time periods of an equal length. it is known that the mean number of occurrences in ten minutes is 5.3. the appropriate probability distribution for the random variable

Inez has a phone card. the graph shows the number of minutes that remain on her phone card a certain number of days.