The ratio of the boys to girls in the cafeteria is 3: 4. if there are 40 more girls than boys, how many girls are in the cafeteria?

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).

The standard deviation for a set of data is 5.5. the mean is 265. what is the margin of error?

Over which interval is the graph of f(x) = x2 + 5x + 6 increasing?