Answer: Choice B) 
Work Shown:

Note: secant is positive in quadrant Q4, when theta is between 3pi/2 radians and 2pi radians (270 degrees and 360 degrees). So that's why we don't consider the minus form of the plus minus.
Answer:
144
Step-by-step explanation:
If you multiply 4 by 12, then add 100, you get 144 which is the area.
Answer:
Just took test, got it right. In the following:
Step-by-step explanation:
Scenarios:
A- Survey
B- Observation
C- Experiment
D- Survey
The enthalpy of a reaction can be measured using a Calorimeter
Answer:
3
Step-by-step explanation:
15 divided by 5 equals 3.