A painting in an art gallery has height h and is hung so that its lower edge is a distance d above the eye of an abserver. How far from the wall should the observer stand to get the best view?(maximize the angle) - the answer is 5-2root5 from A I dont know the reason

Acar traveling at 65 mph leaves 25 foot skid mark what is the ratio of the speed to length of skid mark (feet) in the simplest form

Someone answer asap for ! max 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.

Evaluate 8j -k+148j−k+14 when j=0.25j=0.25 and k=1k=1.