Amodel car has a scale of 1 inches : 2 feet, if the model car is 5 inches long, then how long is the real car?

Step-by-step explanation:

To answer this question, a proportion is best. We know that 1 inches = 2 feet. So we want to find the feet measurement for 5 inches. When we set up a proportion, we get 1 inches/2 feet = 5 inches/ x feet. Now, you cross multiply, so you multiply 1 and X, and 2 and 5. As a result you get 1x=10. To get rid of the 1 in front of the X, you divide by 1 on both sides. As a result, you get that x=10 meaning that 5 inches is equal to 10 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.

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