Alison had 310 rocks in her rock collection. After three months, her collection increases by 40%. How many rocks does Alison have now​

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).

Complete the solution of the equation. find the value of y when x equals to 6 4x+y=20

The surface area of the triangular prism is .