[填空题]
The water in a pool is being(zmpbbc,:2 yl pumped out m ft9p1aqxn yx5m x9dua t073/into a nearby lake at a rate of r litres per second ptdxa9uxx1mf ay/n9 q0 5m3t7where r=$\frac{2 t}{275}$ and t is time measured in seconds. The graph of this is shown below.
1. Find out how much water has been pumped out after 1 minute,We get V≈ L
2. Determine an expression for the volume of water that has been pumped out of the pool for any given number of seconds, s ;The volume of water that has been pumped out of the pool after s seconds can be expressed as
v=$\frac{a}{b}$s$^2$ (L) ;a= ,b= .
