Question 1011874
the equation is d(s) = 30 + 5*sqrt(s).


you are given that d(s) = 58.


the equation becomes 58 = 30 + 5 * sqrt(s).


subtract 30 from both sides of the equation to get 28 = 5 * sqrt(s).


divide both sides of the equation by 5 rto get 28/5 = sqrt(s).


square both sides of the equation to get (28/5)^2 = s.


solve for s to get s = 31.36.


replace s in the original equation to get:


58 = 30 + 5 * sqrt(31.36)


evalute the equation to get 58 = 58.


this confirms the solution is correct.