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boyakko [2]
4 years ago
12

Sabrina calculates the cost of a book as $50. The actual price was $56. What is Sabrina's percent error.

Mathematics
1 answer:
kolezko [41]4 years ago
7 0
The percentage is 6% cause, she said that the book was $50 but was original $56 , so ...first go by sabrinas cost ( 50 ) and the actual ( 56 ) so think how much was subtracted from the original price? s - 50 .. a- 56. .... 50 + 6 =56 so go by the amount of the price added to the percentage ...6 % is the answer..hoped this helped
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Answer:

The expression used to find the change in temperature per hour is Algebraic expression

Thus per hour; the temperature falls at the rate of - 3\dfrac{1}{2}^0

Step-by-step explanation:

A temperature falls from 0 to  - 12\dfrac{1}{4}     in     3\dfrac{1}{2} \ hours

Which expression finds the change in temperature per hour.

From the above given information;

The initial temperature is 0

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The change in temperature is \Delta T = T_2  -  T_1

\Delta  T = -12\dfrac{1}{4} -0

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To find the change in x°   per hour; we have;

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The expression used to find the change in temperature per hour is Algebraic expression

From above if we cross multiply ; we have;

(- 12.25° × 1 hour) = (x° × 3.5 hour)

Divide both sides by 3.5 hours; we have:

\dfrac{-12.25^0*1 }{3.5}=\dfrac{ x^0 *3.5}{3.5}

x° =  - 3.5

x° = - 3\dfrac{1}{2}

Thus per hour; the temperature falls at the rate of - 3\dfrac{1}{2}^0

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