An equilateral triangle inscribed in a circle has a length of 20cm find the distance to the centre and the radius​

The number of nails of a given length is normally distributed with a mean length of 5.00 in, and a standard deviation of 0.03 in. find the number of nails in a bag of 120 that are less than 4.94 in. long.

Eis the midpoint of line segment ac and bd also line segment ed is congruent to ec prove that line segment ae is congruent to line segment be

How long must $542 be invested at a rate of 7% to earn $303.52 in interest? in a easier way