A submarine starts at the surface of the water. The sub then goes down 100 feet. Over the next three hours, it goes down 150 feet per hour. After this time, what is the depth of the submarine?

A.-550 feet
B.-450 feet
C.-350 feet
D.-250 feet

225x²+4=0

225x²=0-4

225x²=-4

x²=-4/225

x=±√-4/225

the area of the rectangle is 35units^2.

step-by-step explanation:

graph it and find the distance.

it is a 5*7 rectangle.

therefore the area is 35units^2.

the answer is 9 because the question is telling how much it be together.