Plz help asap

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

Mia’s gross pay is 2953 her deductions total 724.15 what percent if her gross pay is take-home pay

The focus of a parabola is (-4,-5) and its directrix is y=-1 find the equation