Find the length of the rectangle. A. 30 miles B. 21 miles C. 8 miles D. 4 miles. Sorry if I sound like a know it all or a robot!

Given: △abc, ab=15, bd=9 ad ⊥ bc , m∠c=30°. find: the perimeter of the triangle.

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.

Look at this pattern ; 1,4,9, number 10000 belongs in this pattern . what’s the place of this number?