Answer: The focal length of the lens = 3.32 cm.
Explanation:
Lens formula :
(i)
f= focal length , v=image distance , u =object distance.
magnification: m =
(ii )
Given: v= -12.8 cm , m =2.85
Put values in (ii), we get

substitute values of u , v in (i)

Hence, the focal length of the lens = 3.32 cm.
Answer:
About half or more
Explanation:
Over 50% of the United States population depends on groundwater for drinking water. Groundwater is also one of our most important sources of water for irrigation.
About 115 million people—more than one-third of the Nation's population—rely on groundwater for drinking water.
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A pulsar is a type of neutron star that rotates <span>very rapidly and emits electromagnetic radiation. The correct option among all the options that are given in the question is the last option or the third option. I hope that this is the answer that has actually come to your desired help.</span>
A is not linked. Coal burning is not an effect of acid rain.
~Deceptiøn