Diona is pointing a circular mural or her wall. Hermural is going to have a diameter of 7
feet. How much wall socce will she be
pointing? Pls show equation.

Pam buys a sleeve of ball bearings for her skateboard. each of the bearings is 1 1/5 inches wide. the sleeve is 9 3/5 inches long. how many ball bearings are in the sleeve? show your work.

If f(x)=3x+1 and f^-1=x-1/3, then f^-1(7)=

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