Please help me with my math question?

Acircle has a circumference of 28.36 units what is the diameter of the circle

Someone answer asap for ! the following statements are true about the coins calvin and sasha have collected. * calvin and sasha has the same amount of money. * calvin has only quarters. * sasha has dimes, nickels, and pennies * calvin has the same number of quarters as sasha has dimes. * sasha has $1.95 in coins that are not dimes. exactly how many quarters does calvin have?

The table showed price paid per concert ticket on a popular online auction site. what was the average price paid per ticket