Mathematics, 28.12.2019 01:31 bhas2042

Aresearch student measured the age of an ice layer at 70 m depth as 425 years. the accepted value reported is 427 years. what is the percent error of students value?

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Answer from: mrsjenrucker

0.47%.

Step-by-step explanation:

We have been given that a research student measured the age of an ice layer at 70 m depth as 425 years. The accepted value reported is 427 years.

We will use error percent formula to solve our given problem.

$\text{Error percentage}=\frac{|\text{Approx value}-\text{Exact value}|}{\text{Exact value}}\times 100$

$\text{Error percentage}=\frac{|425-427|}{427}\times 100$

$\text{Error percentage}=\frac{|-2|}{427}\times 100$

$\text{Error percentage}=\frac{2}{427}\times 100$

$\text{Error percentage}=0.0046838407494145\times 100$

$\text{Error percentage}=0.46838407494145$

Rounding to two decimal places:

$\text{Error percentage}\approx 0.47$

Therefore, the percent error of students value is approximately 0.47%.

Answer from: Quest

The academic affairs council is the highest expert body processing academic affairs, as stipulated by the university statutes. specialist aaro häkkinen (educational policy) took part in the council’s meeting. the agenda of the meeting included bachelors’ feedback, the timing of pedagogical studies, the grant system for tuition fees, the standardisation of administrative practices for internships and the situation of foreign-language and multilingual master’s programmes.

Answer from: Quest

let's cover over the formula of the vertex:

y = a(x – h)^2 + k

in this formula, (h,k) are the vertex, always remember that the positive or negative value of the vertex is based on the sign it has.

for example, if the vertex is -3,-6 then both the x and y value would have the positive sign attached to it and if it were a positive x and y value, then a negative sign would be attached to it.

with that being said, for our problem the x value is a positive one so we are looking for a number with a negative sign next to it, in this case the first and second choice.

however, for the first answer choice it isn't quite part of the formula so we know that the answer choice correctly displays the x value.

to confirm, we can see if the -1 fits correctly with the second answer choice, and as mentioned above a negative number will have a positive sign attached to it. so, for our problem we can see that -1 has been changed to +1, so we can confirm that the second answer choice is correct.

hence, our final answer is y=(x - 1)^2 + 1

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