the boat is on the same horizontal level as the foot of a cliff and the angle of depression of the boat from the top of the cliff is 30 degree if the boat is 120 m away from the foot of the cliff, find the height of the cliff and correct to three significant figures

the answer is ! ?

answer: group b.

step-by-step explanation:

let x and 400 - x be the two numbers.  

==> 0.80x + 0.85(400 - x) = 400 - 68 from the statement of the problem.  

< ==> 0.80x + 0.85(400 - x) = 400 - 68  

==> 340 - 0.05x = 332  

< ==> -0.05x = -8 ==> x = 160, the first number ==> 400 - x = 240, the second number.