Answer:
21.8° (22° to the nearest degree)
Step-by-step explanation:
Using cosine law:
a² = b² + c² - 2bc(cosA)
3² = 5² + 7² - 2(5)(7)cosA
cosA = 13/14
A = 21.7867893
Approximately angle: 22°
Answer:
The approximate margin of error = ± 0.1131607
Step-by-step explanation:
By margin of error = ± Z *
We assume 95% confidence interval. Thus Z = 1.96. Since the survey is about support or oppose, we assume equal proportion: 50% for and 50% against.
Hence, margin of error = ± 1.96* ((0.5*0.5)/75)^(0.5)
= ± 0.1131607
Just multiply and the answer should be in=78x
The Apex answer is 54%. Hope this helps! ^ your answer would have been right but you forgot to multiply 25% with the second half of the asked question.
2.3 + 6.82 : 3.74 + 1.09 = 3.39 + 1.8 = 5.19