A toy drone has been programmed to fly in a pattern of a cosine wave. You are timing the drone's movements. At 11 seconds on your stopwatch, it is 35 feet in the air, which is the highest it gets. At 21 seconds, it has dropped down to 5 feet, which is the lowest it gets. At 31 seconds, it is back up to 35 feet again. It continues in this pattern for a while and you continue to time its movements. What is the amplitude, vertical shift, phase shift, period, variable b, and how many seconds after the 41 second mark until it reaches 23 feet?? URGENT

Christine wong has asked dave and mike to her move into a new apartment on sunday morning. she has asked them both, in case one of them does not show up. from past experience, christine knows that there is a 40% chance that dave will not show up and a 30% chance that mik a. what is the probability that both dave and mike will show up? (round your answer to 2 decimal places.) b. what is the probability that at least one of them will show up? c. what is the probability that neither dave nor mike will show up? (round your answer to 2 decimal places.)e will not show up. dave and mike do not know each other and their decisions can be assumed to be independent.