Help me PLZ im offering 20 points

1) you deposit $2,500 in an account that earns 4% simple interest. how much do you earn in eight years?

Acompany that makes? hair-care products had 5000 people try a new shampoo. of the 5000 ? people, 35 had a mild allergic reaction. what percent of the people had a mild allergic? reaction?

Ahyperbola centered at the origin has a vertex at (-6,0) and a focus at (10,0). what are the directrices?