What is the scale factor if the scale is 5inches = 1 yard?

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).

Find the unit rate for: 75% high-fiber chimp food to 25% high -protein chimp food.

What adds to be the bottom number but also multiplies to be the top number with 8 on the bottom and 15 on top