Find the median And mode of 8,3,12,5,2,9,3

If 10 men take 18 days to mow 60 acres of grass, how long will 15 men take to mow 80 acres?

Identify the conclusion of the conditional statement. if you live in phoenix, then you live in arizona.

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) = .