Circle q has a circumference of approximately 50 centimeters.

what is the approximate length of the diameter, d? use 3.14 for π. round to the nearest tenth of a centimeter.

a 8.0
b 11.9
c 15.9
d 16.0

Prove (a) cosh2(x) − sinh2(x) = 1 and (b) 1 − tanh 2(x) = sech 2(x). solution (a) cosh2(x) − sinh2(x) = ex + e−x 2 2 − 2 = e2x + 2 + e−2x 4 − = 4 = . (b) we start with the identity proved in part (a): cosh2(x) − sinh2(x) = 1. if we divide both sides by cosh2(x), we get 1 − sinh2(x) cosh2(x) = 1 or 1 − tanh 2(x) = .

This is about circle theorems. someone asap : (

Acompany made a profit of 75000 over a period of 6 years on an initial investment of 15000 what is the annual roi