1 The focal length, F, of a camera's lens is related to the distance of
the object from the lens, J, and the distance to the image area in the
camera, W, by the formula below.
+
1
I
1
W
1
F
When this equation is solved for ) in terms of F and W. J equals
(1) F-W
(3)
FW
W - F
(2)
FW
F-W
1
F
1
W

< coa = 150 ( given)

as ba and bc are tangents

so oc and oa is perpendicular to cb and ab respectively because in circle normal passes through centre

so in quadrilateral oabc

< coa + < oab + < ocb + < abc = 360

150 +90+90 + < abc = 360

330 + < abc = 360

< abc = 360 -330 = 30

so < abc = 30

⭐dhruv⭐

18.75 gallons

step-by-step explanation:

the radius is 2 times the diameter.

step-by-step explanation: