Johnathan worked as a contractor for 18 years before he became permanently disabled and unable to work. johnathan was 47 years old and had planned to retire at age 60. his final annual salary was $71,740. his employer's rate of benefits is 1.6%. what is his annual disability benefit?

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) = .

    choose the correct definition for  extremo.  a.  end      b.  extra      c.  extract      d.  eventual 

Bob the builder is making 480kg of cement mix. this is made by cement, sand and gravel in the ratio 1: 3: 4