Express 0.18 as a fraction in lowest terms.

a: 10/18
b: 9/50
c: 18/100
d: 3/16

At least two people have the same birthday in a school of 150 students

Alex drew a circle with right triangle prq inscribed in it, as shown below: the figure shows a circle with points p, q, and r on it forming an inscribed triangle. side pq is a chord through the center and angle r is a right angle. arc qr measures 80 degrees.

This race was first held in 1953 on august 16th. every decade the race finishes with a festival. how many years is this?