Asubmarine's position is 600 feet below sea level. it descends 218 feet. what is the submarine's new elevation? a) -818 ft b) -600 ft c) -382 ft d) 382 ft

Parabolas y=−2x^2 and y=2x^2 +k intersect at points a and b that are in the third and the fourth quadrants respectively. find k if length of the segment ab is 5.

If tan2a=cot(a+60), find the value of a, where 2a is an acute angle

Pls the last one and it has to be like number 6