Use inverse trigonometric functions to find the solution to the equation cos(x)=0.6 on integral from 0 to 4pi

Isee the amount was $90.00 then reduced to $75.00 , what is the percent ?

(x-5)1/2+5=2 what is a possible solution?

Consider this expression and the steps to evaluate it. 4^5(−2)^9/4^8(−2)^3 1. apply the quotient of powers:      (−2)^a/4^b 2. evaluate powers:           c/d select the value of each variable. a = _ b = _ c = _ d = _