What is the effect on the graph of the function f(x) = |9x| when f(x) is changed to f( 2 3 x)? a)stretched vertically b)compressed vertically c)stretched horizontally d)compressed horizontally

Hello!
volume of sphere =4/3.pi.r^3

The second and fourth answer are correct

First step is to get rid of the square root. remember that a square root is the same as raising to the (1/2) power. see below: multiply exponents per exponent rules to get: remember you subtract exponents from the denominator and add exponents in the numerator so: simplify further: so a is the correct choice. if you don't understand this google exponent rules and it will you understand. look at the image results.