Write an equation of the line containing the given point and perpendicular to the given line. express your answer in the form yequalsmxplusb. (4,9); 7xplusyequals8

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.

When a rectangle is dilated, how do the perimeter and area of the rectangle change?

Christina can paint 420 square feet in 105 minutes. which unit rate describes the scenario?