Select the statements that are true based on the following given information. D = {x1 x is a whole number)
E = {xl x is a perfect square < 36}
F={xl x is an even number between 20 and 30)
The expression DU E = E.
EU (Dn F) is (25).
OECD
(En F) is the empty set.
Set E is infinite.

The distribution of the amount of money spent by students for textbooks in a semester is approximately normal in shape with a mean of $235 and a standard deviation of $20. according to the standard deviation rule, how much did almost all (99.7%) of the students spend on textbooks in a semester?

The cost of a taxi ride includes an initial charge of $2.00. if a 5km ride cost $6.00 and a 10km ride cost $10.00, determine the cost of a 15km ride.

Is the response to the survey question "did you smoke in the last week question mark "response to the survey question "did you smoke in the last week? " a discrete random variable, a continuous random variable, or not a random variable?