Is 0.5 greater than 9/18

An air conditioning system can circulate 350 cubic feet of air per minute. how many cubic yards of air can it circulate per minute?

Astore sells two types of radios. one type sells $87 and the other for $119. if 25 were sold and the sales were $2495, how many of the $87 radios were sold a) 5 b) 20 c) 15 d)10

Given: circle o, cd is diameter, chord ab || cd. arc ab = 74°, find arc ca.