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

a = Negative StartFraction 100 over 420 EndFraction; b = negative 23.8 percent
a = Negative StartFraction 100 over 520 EndFraction; b = negative 19.2 percent
a = StartFraction 100 over 520 EndFraction; b = 19.2 percent
a = StartFraction 100 over 420 EndFraction; b = 23.8 percent

Can you me find the missing length. i attached an image.

Gexpressions: practice question 3 of 5 jackson wants to study the popularity of his music video by tracking the number of views the video gets on his website. the expression below represents the total number of views that jackson's video receives n days after he begins tracking the nu views, where b is the rate at which the number of views changes. alb)" select the statement that would accurately describe the effect of tripling a, the initial number of views before jackson beginst the rate at which the number of views changes, b, will triple. the total number of views the video has after n days, a(b)", will not change. the total number of days since jackson begins tracking views, n, will be reduced by one-third. the total number of views the video has after n days, alb)", will triple. submit

Which radical expression is a rational number? a. √ 360 b. √ 644 c. √ 225 d. √ 122