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53.12ft

Step-by-step explanation:

Area of triangle:

The formula to find the area of a triangle is 1/2bh

- We plug in the values given.

1/2 x 8 x 7

Which is 28ft.

Area of semicircle:

The formula to find the area of a semicircle is 1/2

- We plug in the values given

1/2 x x

1/2 x 16

8 or 8 x 3.14 = 25.12

                    In order to get the total area of the whole shape we need to add the areas of those two, which will be 25.12 + 28 = 53.12

the answer is (-4,-4)

hope this ! : d

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.