9 c 10 b 11 b 12a 13 c 14 d 15 d 16c 17 a or c
18 b 19 d 20 is b
Make x the subject means you need to solve for x
y = ax^2 solve for x
divide both side by a
y/a = ax^2/a
simplify
y/a = x^2
so
x = square root (y/a)
False, mutations occur at varying rates
Answer is c as the equation for the volume of a cylinder is pi x r^2 x h which equated to pi x 25 x 11 which equals 275 and your units have to be cubed as it is volume.
