Math question help?

An object is thrown straight up with a velocity, in ft/s, given by v(t) = -32t + 79, where t is in seconds, from a height of 500 feet. a.) What is the object's initial velocity? 79 ft/s b.)What is the object's maximum velocity? 79ft/s c.)What is the object's maximum displacement? d.)When does the... show more An object is thrown straight up with a velocity, in ft/s, given by v(t) = -32t + 79, where t is in seconds, from a height of 500 feet.
a.) What is the object's initial velocity? 79 ft/s
b.)What is the object's maximum velocity? 79ft/s
c.)What is the object's maximum displacement?
d.)When does the maximum displacement occur?
e.)When is the object's displacement 0?
f.)What is the object's maximum height?
I already solved a and b, but I am struggling on c-f.
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