Manny and emma are both competing in a long jump competition at their school. manny can jump two thirds of the distance that emma can jump. manny can jump 18 inches. how far can emma jump? a 18.7 inches b 27 inches c 12 inches d 17.3 inches

It took alice 5 5/6 hours to drive to her grandparents' house for . on the way home, she ran into traffic and it took her 7 3/8 hours. how much longer did the return trip take? write your answer as a proper fraction or mixed number in simplest form. the trip home took __hours longer. ?

The? half-life of a radioactive substance is 20 years. if you start with some amount of this? substance, what fraction will remain in 120 ? years

How many and of which kind of roots does the equation f(x)=2x^4−9x^3+17x^2−16x+6 have?