Felix measured a house and its lot and made a scale drawing. he used the scale 1 inch : 8 feet. if the porch is 2 inches in the drawing, how wide is the actual porch?

16 feet wide

Step-by-step explanation:

Use the proportion

1 in is to 8 feet as 2 inches is to 'x' feet.

1/8 = 2/x    

now solve by cross multiplying

x = 16 feet

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.