The scale on a map states that 1 centimeters correspond to 40 kilometers on the map two cities are 1.3cm apart

52

Step-by-step explanation:

First you can eliminate the one and put 40 to the side. Then you are left with the 0.3. Multiply 40 by 0.3 to get 12. The add 40 and 12 to get 52

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.

a)(x-2)^2+(y-1)^2=9

step-by-step explanation:

(picture explains)