A toy was originally $35 and it is now $28. What prectinge was the toy marked down to?
2 answers:
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Answer:
(a)
Step-by-step explanation:
The tangent and the normal at point P are perpendicular.
Given
= 3, then
Given the gradient m of the tangent then the gradient of a line perpendicular to it is
= -
= -
→ (a)