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Mack's Parking Garage charges $4.00 for the first hour and $2.50 for each additional hour. For how long has a car been parked when the charge exceeds $16.50?

Mack's Parking Garage charges $4.00 for the first hour and $2.50 for each additional hour. For how long has a car been parked when the charge exceeds $16.50?

If F is the focal length of a convex lens and an object is placed at a distance x from the lens then its image will be at a distance y from the lens, where F,x, and y are related by the lens equation 1/F = 1/x + 1/y Suppose that a lens has a focal length of 4.8 cm,...