Answer:
√7 ≈ 2.646
Step-by-step explanation:
The law of cosines is applicable. It tells you ...
c² = a² + b² - 2ab·cos(C) . . . . . where a, b, c are triangle side lengths, and angle C is opposite side c.
Filling in the given information, you have ...
c² = 2² + 3² - 2·2·3·cos(60°) = 4 + 9 - 12·(1/2) = 7
c = √7 ≈ 2.646
The length of the third side is √7, about 2.646 units.
Student 4 has the largest percent error.
Step-by-step explanation:
The percent error of a measurement is given by
where
x is the value of the measurement
is the actual value
For student 1:
Percent error:
For student 2:
Percent error:
For student 3:
Percent error:
For student 4:
Percent error:
So, student 4 has the largest percent error.
Learn more about errors:
#LearnwithBrainly
Answer:
11 gallons of gas is needed to travel 231 miles.
Step-by-step explanation:
We can set up a proportion for this problem.
<em>For every 62 miles, you use 3 gallons of gas. </em>
Now, let's cross multiply.
≈
So, you will need about 11 gallons of gas to travel 231 miles.