Answer:
- 
Step-by-step explanation:
Given 630 < A > 720 then A is in the fourth quadrant where
cosA > 0 and sinA < 0
Given
cosA = 
= 
Then the triangle is a 3- 4 - 5 with opposite side 4, thus
sinA = - 
= - 
Using the trigonometric identity
sin2A = 2sinAcosA
= 2 × - ×
= 
= -
Answer: Observational study
Step-by-step explanation:
The study illustrated in the question is an observational study. It is referred to as an observational study, because in this case, the price of the individual cereals us not being controlled by the students. They've no control over it.
If it was an experiment, there'll have been a control group and the students will have control over the price. Also, the sampling methods used here is a systematic random sampling.
To do this question you need to multiply base times height. So it would be 24*17. After that, you should get 408 square feet.
Answer:
The answer is the Last Graph
D
Step-by-step explanation:
