Which statement is false? A. Every irrational number is also real.
B. Every integer is also a rational number.
• C. Every rational number is also an integer.
D. No rational number is irrational.

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).

Write the equation for the parabola that has x− intercepts (−2,0) and (4,0) and y− intercept (0,4).

Gabrielle's age is two times mikhail's age. the sum of their ages is 84. what is mikhail's age?