Acircle has its center at (-2, -3) and a radius of 3 units. what is the equation of the circle?
a. (x+2)^2 + (y-3)^2 =9
b. (x-2)^2 + (y-3)^2 =3
c. (x+2)^2 + (y+3)^2 =9
d. (x+2)^2 + (y+3)^2 =3

Find the gradient of f(x,y,z)equals=left parenthesis x squared plus y squared plus z squared right parenthesis superscript negative 1 divided by 2 baseline plus ln left parenthesis x right parenthesis x2+y2+z2−1/2+ln(xyz) at the point left parenthesis negative 2 comma 1 comma negative 2 right parenthesis(−2,1,−2).

If 10 men take 18 days to mow 60 acres of grass, how long will 15 men take to mow 80 acres?

The areas of two similar triangles are 72dm2 and 50dm2. the sum of their perimeters is 226dm. what is the perimeter of each of these triangles?