Agirl had two cookies for dessert. her first cookie had diameter of 4 inches and her second cookie had a diameter of 5.5 inches. what is the total exact area of cookies that the girl ate?
**i know what formula to use i just don't know what to substitute pi with.

Standard deviation of 19,29,21,22,23

Lin is writing an equation to model the proportional relationship between y, the total cost in dollars of downloading videos from a website, and x, the number of videos downloaded. she knows that the total cost to download 3 videos was $12. her work to find the equation is shown below. joylin’s work step 1 k= 3/12= 0.25 step 2 y= 0.25x where did joylin make her first error?

15 and 14.7 are 1 apart, so 15 – 14.7 must be 1.