Applying the law of cosine, b² = a² + c² - 2ac(cos B), the length of AC of the marsh, to one decimal place, is: 522.1 meters
<h3>What is the Law of Cosine?</h3>
The Law of Cosine is given as, b² = a² + c² - 2ac(cos B).
From the diagram given, we have the following:
- B = 180 - 75 = 105°
- b = AC (length of the marsh)
- a = 220 m
- c = 420 m
Plug in the values into the law of cosine formula:
b² = 220² + 420² - 2(220)(420)(cos 105)
b² = 272,629.8
b = √272,629.8
b = 522.1 meters. (Length of AC of the marsh)
Learn more about the law of cosine on:
brainly.com/question/7872492
Yes.
9m-3m=1+19
6m=20
m=20/6=10/3
Answer:
w = 8
Step-by-step explanation:
7w = 56
Divide both sides by 7
w = 56/7
w = 8
For this problem you can create a proportion.
Since 31,100 copies is 7.8% of the total copies spoke up to date you can make this proportion:
31,100. 7.8%
——— =. ———
x. 100%
Now you cross multiply and you will get
7.8x=3,110,000
After this you solve for x by isolating the variable.
7.8x/7.8. 3,110,000/7.8
x=398,717.949
Since the question asks you to round to the nearest whole number which is 7 then the final answer would be 398,718
Answer: There has been 398,718 copies sold to date.
Step-by-step explanation:
