The rate of collection by a solar panel decreased steadily throughout the day due to increasing cloud cover until it reached a constant amount. Later in the day, there were two short periods where the Sun appeared, only for the cloud cover to return.

Which graph models the amount of energy collected depending on the time since the cloud cover began?

(Graphs are in order from A B C D)

The random variable x is defined as the number marking the sector in which the arrow lands when the spinner in the diagram is spun once.

Astandard deck of cards contains 52 cards. one card is selected from the deck. (a) compute the probability of randomly selecting a diamond or heart. (type an integer or a decimal rounded to three decimal places as needed.) (b) compute the probability of randomly selecting a diamond or heart or club. (type an integer or a decimal rounded to three decimal places as needed.) (c) compute the probability of randomly selecting queen or club. (type an integer or a decimal rounded to three decimal places as needed.)

Is (root2 -2)^2 rational or irrational. show the steps and answer fast