Asoccer ball is kicked straight up from the ground with an initial velocity of 32 feet per second. its height above ground in feet is given by:
s(t)=-16t^2 +32t
where t is time in seconds.
i am looking for the max height of the ball, as well as when it hits the ground. my major question is this: do i have to find c before i solve this? (ax^2 +bx+ c) is that even necessary in this word problem?
you!

The average number of vehicles waiting in line to enter a parking lot can be modeled by the function f left parenthesis x right x squared over 2 left parenthesis 1 minus x right parenthesis endfraction , where x is a number between 0 and 1 known as the traffic intensity. find the rate of change of the number of vehicles waiting with respect to the traffic intensity for the intensities (a) xequals0.3 and (b) xequals0.6.

Suppose that an airline uses a seat width of 16.516.5 in. assume men have hip breadths that are normally distributed with a mean of 14.414.4 in. and a standard deviation of 0.90.9 in. complete parts (a) through (c) below. (a) find the probability that if an individual man is randomly selected, his hip breadth will be greater than 16.516.5 in. the probability is nothing. (round to four decimal places as needed.)

Which shows the correct substitution of the values a,b and c from the equation 1=-2x+3x^2+1