How much string would you need to go around the bottom of a hat shaped like a cone if the radius is 4 inches? (use 3.14 for pi)

a) 12.56 in
b) 25.12 in
c) 50.24 in
d) 120.32 in

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).

Add the two expressions 3.8b - 7 and 2.9b + 9 enter your answer in simplified form

Why did the ice arena get so hot after the big game (this is math related google it to find the paper