3. an architect wants to use the riser-tread formula to design a stairway with a total rise of 9 feet, a riser
between 7 and 8 inches, and an odd number of steps. with the architect's constraints, which of the following
must be the tread depth, in inches, of the stairway? show all work that leads to your answer. (1 foot = 12 inches)

Will give brainliest if you answer question correct

The lengths of nails produced in a factory are normally distributed with a mean of 4.91 centimeters and a standard deviation of 0.05 centimeters. find the two lengths that separate the top 4% and the bottom 4%. these lengths could serve as limits used to identify which nails should be rejected. round your answer to the nearest hundredth, if necessary.

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.