Answer:
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Answer: rational
Step-by-step explanation:
Answer:
Maria did her job properly. Both gears are perpendicular.
Step-by-step explanation:
Recall that given vectors a and b, they are perpendicular if and only if
=0. If
. Then
.
IN our case a=(5,-1,2) and b) (1,-3,-4). So,

So both gears are perpendicular.
Answer:
Do the formula below
Step-by-step explanation:
you would do pi * radius^2 to get area then divide by 4 and take that and you will have 1/4 of the circle