Which models selecting a combination of 3 objects taken from a group of 8 items? a) 8c3 = 8! /5! b) 3c8 = 5! /8! c) 8c3 = 8! /(5! )3! d) 3c8 = 3! /(3! )5!

Right triangle xyz has a right angle at vertex y and a hypotenuse that measures 24 cm. angle zxy measures 70º. what is the length of line segment xy? round to the nearest tenth. 8.2 cm 8.7 cm 22.6 m 25.5 cm