# Question: water is poured into a container that has a leak...

###### Question details

Water is poured into a container that has a leak. The mass
*m* of the water is given as a function of time *t*
by *m* = 5.0*t*^{0.8} - 3.3*t* + 23,
with *t* ≥ 0, *m* in grams, and *t* in
seconds. **(a)** At what time is the water mass
greatest, and **(b)**what is that greatest mass? What
is the rate of mass change at **(c)** *t* = 1.9
s and **(d)** *t* = 5.0 s?