Geometric mean of 384 and 6

Find the domain of the following expression: 1/(√x)-2

Two variables, x and y, vary inversely, and x=12 when y=4. what is the value of y when x=3?

The value, v, of kalani’s stock investments over a time period, x, can be determined using the equation v=750(0.80)^-x. what is the rate of increase or decrease associated with this account? 20% decrease 20% increase 25% decrease 25% increase