Approximately % of the area under the normal curve is between mu minus sigma and mu plus sigmaμ− σ and μ+ σ.

Solve the problem by making up an equation. a child is 12 years old, and his father is 32 years older. in how many years will the age of the father be 3 times the age of the child?

Fred has a total of 62 dvd and cd. if the number of cd is three more than two times the number of dvd, how many cd does he have?

What is the standard form of -5x^2+2x^4-11+x^3+3x