A circle with radius 10 has a sector with a central angle of 2/5pi radians.
What is the area of the sector?

  20π square units

Step-by-step explanation:

The area of a sector with central angle θ is ...

  A = (1/2)r²θ

Filling in the given values, we find the area to be ...

  A = (1/2)(10 units)²(2/5π) = 20π units²

The area of the sector is 20π units².

2? if not the correct answer you might need to provide more information

step-by-step explanation:

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.