You need to have a password with 6 letters followed by 2 odd digits between 0 and 9, inclusive. if the characters and digits cannot be used more than once, how many choices do you have for your password?

Aprojectile is thrown upward so that its distance above the ground after t seconds is given by the function h(t) = -16t2 + 704t. after how many seconds does the projectile take to reach its maximum height?