What is the value of x when 9( x - 9)= -11

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.

Need same math paper but the back now i hope your able to read it cleary i need with hw

The curved part of the figure is the semicircle what is the best approximation for the area of this figure