Please help me with this question 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

Which angle has the same measure as the dehedral angle formed by the orange face and the purple rectangle

Which rotation about its center will carry a regular hexagon onto itself