Serra rode 15 mi in 1.5 hr. phaelon rode 38 mi in 3.5 h. justice rode 22 mi in 2.25 hr. who had the fastest average speed?

The general form of the quetion of a circle is ax^2+by^2+cx+dy+e=0 where a=b=0 if the circle has a radius of three units and the center lies on the y axis which set of values of a, b, c, d, and e might correspond to the circle

A. 127 cm^2 b. 144.5 cm^2 c. 172 cm^2 d. 50 cm^2

Barbara deposited $300 in the bank. if the bank pays her simple interest at the rate of 4 percent per year, how much money will she have in her account at the end of 9 months?