Assuming that Anita needs hollow right circular cones, we are solving for its lateral surface area, which is given by the formula πr√(h²+r²), where r is the radius and h is the height. r = 6 ft / 2 = 3 ft
Solving for the lateral surface area of one cone: LSA = (3.14) (3) [√(12²+3²)] = 116.52 sq ft.
Since she needs 10 cones: 10 * 116.52 sq. ft = 1,165.2 sq ft.
You have to find first the discriminant ∆=8^2-4*(-1) *(-7) =36 x=(-8±√36) /-2=(-8±6)/-2=4±3=1 or 7 So x(1)=1 or x(2)=7 -x^2+8x-7=[x-x(1) ][x-x(2) ]=(x-1) (x-7)
