Find the roots of the function.
ƒ(x) = x^2 + 81

x = -81i, 81i
x = -81, 81
x = -9, 9
x = -9i, 9i

Mr switzer needs to buy new 1-foot tiles to cover his bathroom floor. the floor is 12 feet long and 8 feet wide. each square foot of tile will cost $1.79. in dollars what will be the total cost of the tiles he needs to buy.

Of four points are collinear, they are also coplanar

What is the value of the expression i 0 × i 1 × i 2 × i 3 × i 4? 1 –1 i –i