A7.5 cm object is 14 cm from a concave lens, which has a focal length of –7 cm. what is the distance of the image from the lens? round your answer to the nearest whole number. 5 cm –5 cm 14 cm –14 cm

-5 cm

Explanation:

We can use the lens equation:

where

f = -7 cm is the focal lenght

p = 14 cm is the distance of the object from the lens

q is the distance of the image from the lens

Solving the equation for q, we find

the old price per ounce is c/4.

the new price per ounce is c/3.6.

the ratio of the old price to the new one is

(c/4)/(c/3.6) = (c/c)×(3.6/4) = 0.9 . . = 9/10 . . "nine tenths" in either form

answerscientific theory;