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%

Step-by-step explanation:

Given: The predicted value of tablecloths = 420

The actual value of tablecloths = 520

Now, the absolute error is given by :-

$\text{Absolute Error=|Actual Value - Predicted Value|}\\\\\Rightarrow\text{Absolute Error}=|520-420|=|100|=100$

∴ a = 100

The percent error is given by :-

$\text{Percent error}=\frac{\text{Absolute erroe}}{\text{Actual value}}\times100\\\\\Rightarrow\text{Percent error}=\frac{100}{520}\times100\\\\\Rightarrow]\text{Percent error}=19.23\%$

∴ b=19.23%