Please help me.

How many days was the temperature above 90 degrees?

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

Marking brainliest for original answer.. are these two triangles similar? how can you tell?