A myopic girl wears eyeglasses that allow her to have clear distant vision. The power of the lenses of her eyeglasses is -3.00 diopters. Without eyeglasses, the far point of the girl is closest to:
A) 0.33 m
B) 0.25 m
C) 0.17 m
D) 0.42 m
E) 0.50 m
Question 2
A farsighted boy has a near point at 2.0 m and requires eyeglasses to correct his vision. Corrective lenses are available in increments in power of 0.25 diopters.
The eyeglasses should have lenses of the lowest power for which the near point is no further than 25 cm. The boy borrows eyeglasses that have a power of +2.75 diopters. With these eyeglasses, the near point of the boy, in cm, is closest to: A) 31
B) 28
C) 33
D) 37
E) 40
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Finding the derivative using the power rule - Solutions