Answer :
Final answer:
Olivia started knitting 4 hours and 43 minutes before 1913. After calculating, the time she started knitting was 14:20 in 24 hour time format.
Explanation:
In order to answer this question, you must first understand that the 24 hour time format used in this context is based on a whole day being represented as 24 hours. Hence, the time 1913 is equivalent to 7:13 pm in standard time. Olivia started knitting 4 hours and 43 minutes before 1913. In order to find out what time she started at, you need to subtract the time she spent knitting from the time it was when she finished.
Step 1: Convert the hours to minutes. 4 hours equals 240 minutes.
Step 2: Add the extra 43 minutes. This gives a total knitting time of 283 minutes.
Step 3: Subtract this total from the time she finished (1913). First, convert 1913 (7:13 pm) into minutes. This is 13 minutes past 19 hours, so it equals 1143 minutes.
Step 4: Subtract her knitting time (283 minutes) from the time she finished (1143 minutes). This equals 860 minutes.
Step 5: Convert this time back into the 24 hour format. The result is 1440 minutes, or 14:20 in 24 hour time. So, Olivia started knitting at 14:20.
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