Write the vector v in terms of i and j whose magnitude 
and direction angle ? are given.
= 8, ? = 30°
A. v = 4i + 4
j
B. v = -4
i + 4j
C. v = 4
i + 4j
D. v = 4
i + 4
j
Answer: C
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Add or subtract as indicated. Simplify, if necessary.- 
+ 
A. 0
B. 1
C. -1
D. 
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, as needed.Find the [H3O+] if the pH = 2.3.
A. 2.7 × 101 B. 5.0 × 10-3 C. 2.0 × 102 D. 3.6 × 10-1
The bearing of a line segment is the acute angle that the line segment makes with a north- south line. If the bearing of PQ is N 70° E and the bearing of PR is S 32° W, what is the measure of the obtuse angle; ?QPR?
What will be an ideal response?
Solve the problem.A town's average monthly temperature data is represented in the table below: 
Find a sinusoidal function of the form 
that fits the data.
A. y = 28.9 sin 
+ 83.6
B. y = 83.6 sin 
+ 28.9
C. y = 56.25 sin 
+ 27.35
D. y = 27.35 sin 
+ 56.25