A circle has an arc of length 24π that is intercepted by a central angle of 80° What is the radius of the circle? Enter your answer in the box. units​

Which mathematical statements are true? 1) if 3 is an odd number, then 3 times 3 is an even number. 2) if 6 is less than 7, then 4 is greater than 7. 3) six is divisible by 3, and 10 is a multiple of 2. 4) the average of the data is greater than the largest value in the data, or it’s less than the largest value in the data. 5) the slope of a linear graph is its rate of change, and the graph’s y-intercept is the initial value. 6) if an equilateral triangle has equal angles, then all its angles will measure 45°.

Just tell me how to set up the equation.

The two square pyramids are similar. find the total volume of both pyramids if the ratio of their surface areas is 9/16