On Monday, a bicyclist traveled 71 miles in 5 hours. On Tuesday, he traveled the same number of miles, but in half the time. What must have happened to his speed? A.
His speed doubled.

B.
His speed decreased by one-half.

C.
His speed tripled.

D.
His speed decreased by one-third.

Trapezoid abcd is an isosceles trapezoid, ad||cb, a diagonal line runs from angle d to b. angle cdb is 50 degrees and angle dab is 70 degrees, find the remaining angle degrees for angles bda, dba, bcd, and dcb.

Needmax recorded the heights of 500 male humans. he found that the heights were normally distributed around a mean of 177 centimeters. which statements about max’s data must be true? a) the median of max’s data is 250 b) more than half of the data points max recorded were 177 centimeters. c) a data point chosen at random is as likely to be above the mean as it is to be below the mean. d) every height within three standard deviations of the mean is equally likely to be chosen if a data point is selected at random.

8litres of paint can cover 129.6 m². how much paint is required to paint an area of 243m²?