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

In trapezoid efgh, m∠hef=(4x2+16)∘ and m∠gfe=(5x2+12)∘. find the value of x so that efgh is isosceles. i'm desperate.

To describe a sequence of transformations that maps triangle abc onto triangle a"b"c", a student starts with a reflection over the x-axis.how should the student complete the sequence of transformations to map triangle abc onto triangle a"b"c"? plz

What numbers are included in the set of integers? what numbers are not included?