Question

Graziano predicted that he would sell 420 tablecloths. He actually sold 520 tablecloths. What are the values of a and b in the table below? Round the answer to the nearest tenth. Percent Error Item Approximate value Exact value Error Absolute error Ratio Percent error Tablecloths 420 520 a b

Answer 1

A=100/520;b=19.2%

not sure if this is correct but 80% sure

Answer 2

Answer: a = 100, b=19.23%

Explanation:

Given: The predicted value of tablecloths = 420

The actual value of tablecloths = 520

Now, the absolute error is given by :-

`\textActual Value - Predicted Value\\\\\Rightarrow\text{Absolute Error}=|520-420|=|100|=100`

∴ a = 100

The percent error is given by :-

`\text{Percent error}=\frac{\text{Absolute erroe}}{\text{Actual value}}*100\\\\\Rightarrow\text{Percent error}=(100)/(520)*100\\\\\Rightarrow]\text{Percent error}=19.23\%`

∴ b=19.23%