Awatering can dispenses water at a rate of 0.40 gallon per minute. the original volume of water in the can was 10 gallons. which set of ordered pairs shows the volume of water in the can in gallons (y) as a function of time in minutes (x) from the first minute after the can starts dispensing water? (1 point)

{(10, 1), (9.60, 2), (9.20, 3)}

{(1, 10), (2, 9.60), (3, 9.20)}

{(9.60, 1), (9.20, 2), (8.80, 3)}

{(1, 9.60), (2, 9.20), (3, 8.80)}

solution:

the given function is ,

      =

the three roots of this quadratic function is , 0 ,8 and 10.all the roots are real and rational.

if a quadratic equation is of the form ,

sum of the roots = a + b +c= 0+8+10=18=  

product of roots taken two at a time = a b + b c+ c a = 0+80+0=80 =  

product of roots = a b c = 0=  

there are 11 doors in a hall starting from 0 to 11.the entry in the hall is permitted through gate number 0 and exit is allowed through only gate number 8 and 10.so, three roots(0,8,10) of quadratic function is given by entry and exit route of this hall.

8+10

step-by-step explanation:

you multiply 4 by 2 and 5 by 2