What is the exponent on 10 when you write 0.0000638 in scientific notation?

Find the balance at the end of 4 years if 1000 is deposited at the rate of

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 the discriminant if a quadratic equation is 4 which statement describes the roots?