Answer:
d) -4.0
Explanation:
The magnification of a lens is given by

where
M is the magnification
q is the distance of the image from the lens
p is the distance of the object from the lens
In this problem, we have
p = 50 cm is the distance of the object from the lens
q = 250 cm - 50 cm is the distance of the image from the lens (because the image is 250 cm from the obejct
Also, q is positive since the image is real
So, the magnification is

Explanation:
Q is the charge, 9×10^9×3×10^4 is the magnitude ,d = 5 cm therefore q=3×10^4÷5^2=2.7×10^14÷25=1.08×10^13 c
The amount of oxygen will be 22.29 gm required to produce 37.15 g co₂.
<h3>What is a chemical reaction?</h3>
One or more compounds, known as reactants, are transformed into one or more distinct substances, known as products. Such a process is known as a chemical reaction.
Given reaction;

The quantity of oxygen is x and the quantity of carbon dioxide is y then the ratio of their composition is found as;
5x=3y
5x=37.15
x=3×37.15/5
x=22.29 gm
Hence the amount of oxygen will be 22.29 gm
To learn more about the chemical reaction refer to the link;
brainly.com/question/22817140
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When the glasses or contact lenses are used to correct
nearsightedness, the corrective lens forms the image of the object that is
located at the infinity in order, in order for the eye to form a clear image of
the object, the lens will be able to form the image at far point.