3.If the position of an object is given by x(t) = (4t - 7), determine (25 points)
a)
The velocity of the object at any timet
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b)
the acceleration of the object when t = 3.
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Help me please

They have together done 64 installations.to figure this out you must divide 60 hours by how long one installation takes.in this case the technician did 40 installations, while the less experienced colleague did 24.  then, you add up the numbers done by both, giving you 64 installations.