Answer:
It's B :)
Step-by-step explanation:
Answer:
Step-by-step explanation:
You know two sides of the triangle and the angle between them, so use the Law of Cosines to solve the triangle.
a² = √(b²+c² - 2bc·cosA)
= √(9²+7.8² - 2·9·7.8·cos(32°)
≅ 4.8
Then use Heron's formula to calculate the area.
semiperimeter s = 0.5×(a+b+c) ≅ 10.8
area = √(s-(s-a)(s-b)(s-c)) ≅ 18.6 square units
30(6)+25(4)+20(9)=460
$460 this week
Answer:
Step-by-step explanation:
Given that The data to represent average test scores for a class of 16 students includes an outlier value of 78.
We can find sum of all 16 test scores = 84(16) = 1344
Outlier found = 78
If outlier is removed new sum = 1344-78 = 1266
Number of entries without outlier = 15
New average = 1266/12 =84.4
We find that average of new data increases.
Also whenever we remove outlier std deviation also would be reduced.