exam
Maths Puzzle
Numerical Ability
how do i simplfy a radical ?
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exam Other Question
How do you solve this equation?
x-6y=4
3x-18y=4
The focal length f for a camera lens is related to the object distance o and the image distance i by the formula 1/f = 1/o + 1/i:
Fin the image distance i for an object that is 2,000,000 mm from a 250-mm telephoto lens.