Determine the sum or difference in clock 12 arithmetic.(7 + 10) + (12 + 9)
A. 2
B. 38
C. 1
D. 8
Answer: A
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Referring to the circuit below, express IT in rectangular form if IL = 20 mA and IR = 8 mA.
a. 8 + j20 mA
b. 8 + j8 mA
c. 20 + j8 mA
d. 28 + j20 mA
e. 28 + j8 mA
Solve. If necessary, round to the nearest tenth.If a tree 42.5 feet tall casts a shadow that is 17 feet long, find the height of a tree casting a shadow that is 11 feet long.
A. 27.5 ft B. 4.4 ft C. 36.5 ft D. 65.7 ft
Identify the graph of the equation as a parabola, circle, ellipse, or hyperbola.x2 = 9 - 9y2
A. Hyperbola B. Parabola C. Ellipse D. Circle
The polar equation of the graph is either r = a + b cos ? or r = a + b sin ?, a > 0, b > 0. Match the graph to one of the equations. 
A. r = 4 + 2 sin ? B. r = 4 + 2 cos ? C. r = 2 + 4 cos ? D. r = 2 + 4 sin ?