Activity 1 (A Timely Calculator) Instructions: Solve each problem below. Find your answer in the answer column and take note of the letter next to it. Write each letter in each box that contains the number of that problem to solve this riddle: What object calculates eleven plus two equals one and eight plus seven is three? 1. A pendulum has a length of 40 inches that swings through an angle of 18". Find the length of the are through which through which the tip of the pendulum swings. O 2. A car is travelling around rotunda (a traffic circle) at a speed of 42 kilometers per hour. P If the rotunda has a radius of 0.25 kilometers, what is the angle in radians through which the car will turn in 30 seconds? A 3. A local carnival has a Merry-go-round whose radius is 30 feet. If it takes the Merry-go- K 5280m round 70 seconds to make one revolution, what is its linear speed in feet per second? H 4. A windshield wiper of a car is 20 inches long. How many inches will the tip of the wiper trace out in = revolution? C 5. A washing machine's spinner is a circle with a diameter of 22 inches. If the spinner is turning at a rate of 240 rpm, find the linear speed of the spinner in inches per minute. N 3 GIT 1 2 3 4 2 5 L 7 E