Answer: 9.70%
Step-by-step explanation:
The formula to find the percentage error is given by :-

Given : Actual mass of zinc oxide used by pharmacist = 28.35 g
Estimated mass of zinc oxide used by pharmacist =31.1 g
Now, 
i.e. 
i.e. 
Hence, the percentage of error on the basis of the desired quantity.= 9.70%
Groups of four for the group of 288 and groups of five for the group of 360
Find the words Mrs.hilt read
2010 x 21 = 42210 words
Find the money of 21 books
21 x 4.95 = $103.95
Go to Math Papa that'll give you the answers with the work shown and explanations.
Answer:
well i think the answer is B.