Lynn measured the length of her front yard by counting her strides. The yard measured 18.5 feet long. Emily measured the same ya
1 answer:
Answer:
8.11%
Step-by-step explanation:
We need to find the percentage error. We can follow the formula shown below:
Where
PE is the Percentage Error
New is the newest measure (given as 20 feet)
Orig is the original, or first, measure (given as 18.5)
Substituting and finding the PE:
Tagging the percentage , percent error is about 8.11%
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Answer:
1.) ≈ 3.652
2.) I would say something about how the A in front of cos in the equation would change to 90, rather than stay 75 (in the equation for the step by step), but it would be easier to just use the Pythagorean theorem.
Step-by-step explanation:
I think we may have the same class so hopefully this helps:
1.) --> law of cosines formula.
--> plugged in numbers; when you draw the triangle, the included angle would be A, and the opposite side would be a. B and b, and C and c are opposite each other. In this case, a is the hypotenuse.
--> in between steps.
--> more simplifying.
--> answer
2.) This one is just an explanation: The 75 in the equation is the given angle, which is a. If this changes, it would just change in the equation too. And obviously, if it's 90 degrees, you can just use Pythagorean theorem a^2+b^2=c^2.
Good luck! :)