#### Answer

a) $57.15 cm$
b) $38.4048 m$
c) $0.75438 km$
d) $60.96 mm$

#### Work Step by Step

a) To convert in to cm, multiply by 2.54 because 1 in= 2.54 cm. $ 22.5 in\times\frac{2.54 cm}{1 in } = 57.15 cm$
b) To convert from ft to m, divide by 3.281 because 1 m= 3.281 ft. $ 126 ft\times\frac{1 m }{3.281 ft} = 38.4048 m$
c) To convert from yards to km, divide by 1093.61
because 1 km= 1093.61 yards. $ 825 yards\times\frac{1 km }{1093.61 yards} = 0.75438 km$
d) To convert in to cm, multiply by 25.4 because 1 in= 25.4 mm. $ 2.4 in\times\frac{25.4 mm}{1 in } = 60.96 mm$