Original equation V(x) = (4x)^2 (160-5x)
Find the possible values of x when V = 60 000. (Give values correct to 2 decimal places.)
60000 = (4x)^2 (160-5x)

  x ∈ {-4.53, 5.30, 31.23}

Step-by-step explanation:

Finding irrational roots of cubic equations is best done using a graphing calculator. This one shows the values of x to be ...

  x ∈ {-4.53, 5.30, 31.23}

investment b is an ordinary annuity with $3,909.64 in the account after one year.

step-by-step explanation: