Step-by-step explanation:
These are just simple unit conversion problems:
78979.4 mi /hr^2 * 5280 ft / mile * hr^2 / (3600 s )^2 = 32.18 ft/s^2
78979.4 mi / hr^2 * 1609.344 m / mile * hr^2 / 3600s)^2 = 9.81 m/ s^2
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