Given the points a(0, 0), b(e, f), c(0, e) and d(f, 0), determine if line segments ab and cd are parallel, perpendicular or neither.

a. parallel
b. perpendicular
c. neither

The number of hours per week that the television is turned on is determined for each family in a sample. the mean of the data is 37 hours and the median is 33.2 hours. twenty-four of the families in the sample turned on the television for 22 hours or less for the week. the 13th percentile of the data is 22 hours. approximately how many families are in the sample? round your answer to the nearest integer.

Jose is going to use a random number generator 500500 times. each time he uses it, he will get a 1, 2, 3,1,2,3, or 44.

Charlie tosses five coins.what is the probability that all five coins will land tails up.