Two dolphins are catching fish when they begin moving to the surface to get a breath of air. They start swimming toward the surface at the same time. The first dolphin is 120 feet below the surface of the ocean, and he swims upward at a rate of 4 feet/second. The second dolphin is 240 feet below the surface, and she swims upward at a rate of 12 feet/second. Which dolphin surfaces first and when?

step-by-step explanation:

there is a formula i can give you:

it is r^2*n*sin(360/n) divided by 2 where r represents the "radius" and n is the number of sides.

plug them in:

(10sqrt(3))^2*6*sin(360/6) divided by 2

100*3*6*sin(60) divided by 2

900*sin(60)

900*sqrt(3)/2

450*sqrt(3)

approx is 779.4 cm^2

the answer is y < -3 or   y > 3

-3y > 7 + 2

-3 y > 9

y < -3

ddd

step-by-step explanation:

i think the amount would be $140.62