Joy brought pens at $120 a dozen. he sold it for $15 each. what is his profit percent?

This is the number of parts out of 100, the numerator of a fraction where the denominator is 100. submit

Avery’s piggy bank has 300 nickels, 450 pennies, and 150 dimes. she randomly picks three coins. each time she picks a coin, she makes a note of it and puts it back into the piggy bank before picking the next coin.

In a right triangle δabc, the length of leg ac = 5 ft and the hypotenuse ab = 13 ft. find: b the length of the angle bisector of angle ∠a.