Hey there! :D Jeanette's sister started at 5:00 PM. To get that answer, here's what I did: From 5-9 PM, she earned $22. That's because 5.50 x 4 = 22, then from 10-11, she charged $8 which is 8 x 2 = 16 + 22 = $38. Again, she started at 5 PM.
Hope it Helps and makes sense! :D
Time is the duration during which any activity or work is performed. Jeanette's sister started 4 hours before the 9:00 pm which is 5:00 pm.
Given-
Jeanette's sister charges $5.50 per hour before 9:00 pm.
Jeanette's sister charges $8 per hour after 9:00 pm.
She finished babysitting at 11:00 pm
She earned total money $38.
Time is the duration during which any activity or work is performed.
Total hour she worked after the 9:00 pm,
[tex]=11-9=2[/tex]
Thus she worked total 2 hours after the 9:00 pm. She charges charges $8 per hour after 9:00 pm.Hence money earned by her in 2 hours after 9:00 pm ,
[tex]=2\times8=16[/tex]
Thus money earned by her in 2 hours after 9:00 pm is $16. The money earned by her before the 9:00 pm is addition of money earned by her before 9:00 pm and after 9:00 pm. Let money earned by her before 9:00 pm is $x. Thus,
[tex]x+16=38[/tex]
[tex]x=38-16[/tex]
[tex]x=22[/tex]
Thus the money earned by her before 9:00 pm is $22.
She charges $5.50 per hour before 9:00 pm. Hence the $22 charged by her in hours,
[tex]=\dfrac{22}{5.50} =4[/tex]
Therefore, hence Jeanette's sister started 4 hours before the 9:00 pm which is 5:00 pm.
Learn more about the work and time here;
https://brainly.com/question/8536605
