What's the interest rate of $7,000 at 3%

What is the area of the shaded sector?

Adolphin is swimming with her friend. the dolphin jumps to a height of 4.54.54, point, 5 meters above the surface of the water as her friend swims 9.89.89, point, 8 meters directly below her. what is the position of the dolphin's friend relative to the surface of the water? meters

X^2/100+y^2/25=1 the length of the major axis is: a)5 b)10 c)20