Find number abc
If b51ca - ba6b7 = 444c find number abc. Multiple solutions may exist.Correct answers: 4
#brainteasers #math
Photographic patentIn 1840, the first U.S. photographic patent was issued to Alexander S. Wolcott of New York City (No. 1,582). His "method of taking a likeness by means of a concave reflector and plates so prepared that luminous or other rays will act thereon" produced photographs 1.75 x 2.5 inches in size. They were not reversed as were daguerrotype which used refracting lenses. |