Нужно 3 проекции к чертежу вот фото прошу плиз даю 25 баллов очень срочно нужно умоляю ​

The circumference of a circle is 60 pi cm3what is the radius of the circle

Satchi found a used bookstore that sells pre-owned dvds and cds. dvds cost $9 each, and cds cost $7 each. satchi can spend no more than $45.

Can someone me with #s 8, 9, and 11. with just one of the three also works. prove using only trig identities.