Solve the problem.The height of the water, H, in feet, at a boat dock t hours after 7 A.M is given by 
, where t is time measured in seconds. Find the period.
A. 
B. 170?
C. 170
D. 
Answer: C
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Solve the problem.A comet has an orbit that is in the shape of an ellipse with the Sun at one of the foci. The equation is approximately 
where x and y are in astronomical units (an astronomical unit is 93,000,000 miles). Sketch the graph of the comet.
A. 
B. 
C. 
D. 
E = 100 V, R2 = 10 Kê, VR = 50 V and IT = 13.5 mA.
Find the value of R1 and R3 .
2
Find the measure of each numbered angle in the figure below if l, n, and m are parallel and the congruent segments are marked.
Let u represent src="https://sciemce.com/media/4/ppg__tttt0516191133__f1q13g7.jpg" style="vertical-align: -17.0px;" />
, v represent 
, and w represent 
. Solve first for u, v, and w. Then solve the system of equations.
+ 
+ 
= - 
- 
- 
= - 
+ 
+ 
= - 
A. (1, 5, -5)
B. 
C. (-1, -5, -5)
D. (-1, -5, 5)