At a seaport, the depth of the water, h metres, at time t hours, during a certain day is given by h=2.5sin2 π(t-4)/12.4+1.6
What is the maximum depth of the water?
A. 2.5m
B. 4.1m
C. 8.2m
D. 1.6m

table a is wierd

step-by-step explanation:

6*f

the answer would be  

a.

3: 1

step-by-step explanation:

1. 180°. the sum of the interior angles of a triangle is 180°, for the equilateral triangle that it has three equals side is 60°+60°+60°=180°.

2. 60°. each interior angle of a equilateral triangle is 60°

3. 120°. the measure of ∠m is 120°, the sum of the angles ∠m and ∠n is equal to 180°. so, in order to find the measure of ∠m, we have ∠m+∠n=180° > ∠m=180°-∠n > ∠m=180°-60°=120°.

4. 360°. the sum of the exterior angles of an equilateral triangle is ∠m+∠r+∠x=120°+120°+120°=360°. the exterior angles of any triangle always add 360°.