The best approach to this is to use the formular
Standard error = standard deviation / sqrt( sample size)
standard deviation = 0.75 hours
sample size = 35
Hence, Standard error = 0.75 /sqrt(35) = 0.126 = 0.13
Answer:
C.
Step-by-step explanation:

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I don’t know how old this is but hopefully I’m not too late it’s 17 7+10=17 it is NOT 70 ♀️
(5-3)^2 is = -4 , the second one is -9.67
8x-4=-32 so thats an equation that you can use