1. The problem statement, all variables and given/known data Hello! I am trying to solve the exercise, but I don't see my mistakes - I can't come up with a correct answer. The exercise from the begging of trigonometry, so it has to be solved using concepts of a speed and angular velocity. A yo-yo which is 2.25 inches in diameter spins at a rate of 4500 revolutions per minute. How fast is the edge of the yo-yo spinning in miles per hour? Round your answer to two decimal places. 2. Relevant equations Here is how I am trying to solve it: v = r x w, where v is the speed, r radius, w is the average angular velocity, which equals to w = 2π x f, where f is the frequency of revolutions and equals to number of revolutions / time 3. The attempt at a solution Putting it all together I get: r = 2.250 / 2 = 1.225 number of revolutions in one hour 4500 х 60 = 270 000 w = 2π × 270 000 = 1 695 600 v = 1.225 x 1 695 600 = 2 077 110 inches in one hour Convert to miles: 2 077 110 / 63 360 = 32.78 miles per hour But it should be 30.12 miles per hour. Please, help me to find my mistake. Thank you!