Train a & train b leave a central station at the same time. they travel at the same speed, but one in opposite directions, with train a heading towards station a, and train b heading towards station b. train a reaches station a after 3 hours, train b reaches station b after 2 1/4 hours. station a & be are 420 miles apart. what is the rate of the train

Identify a1 and r for the geometric sequence an= -256(-1/4) n-1

The annual snowfall in a town has a mean of 38 inches and a standard deviation of 10 inches. last year there were 63 inches of snow. find the number of standard deviations from the mean that is, rounded to two decimal places. 0.44 standard deviations below the mean 2.50 standard deviations below the mean 0.44 standard deviations above the mean 2.50 standard deviations above the mean

If the endpoints of the diameter of a circle are (8, 6) and (2,0), what is the standard form equation of the circle? a) (x + 5)2 + (y + 3)2 = 18 (x + 5)2 + (y + 3)2 = 3.72 (x - 5)2 + (y - 3)2 = 18 d) (x - 5)2 + (y - 3)2 = 32