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College Algebra
Chapter 3
Chapter 3
View attachment 2490
Using the Pythagorean theorem the first statement was verified using 3960
miles as the earth's radius:
d^2+3960^2=(3960+(362/5280))^2
d^2=(3960+(362/5280))^2-(3960)^2
d=23.3
So the lighthouse cannot be seen from a distance of 26 miles.
1. B. A. Mathematics and Physics -back in my country
1. B. A. Mathematics - here in the US