your question :
here's the solution,
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i hope it helped you..... good luch for your English exam.....
Answer:
Deon spent 1/10 of an hour more on chemistry than on math
Step-by-step explanation:
Solution :
Let :
X = number of overtime hours
S = total weekly salary
S =
S = 480 + 18X
E(S) =
= 750
Mean of S = 750
Var (S) =
Var(S) =
= 5184
Variance of S = 5184
The standard deviation equals square root of 5184 = 72