The best choice would be the option 3cm
Answer: 3 hours and 15 minutes
Step-by-step explanation:
Z = (X - mean)/sd
-1 = (28 - mean)/sd
mean - sd = 28 . . . (1)
-0.5 = (34 - mean)/sd
mean - 0.5sd = 34 . . . (2)
(1) - (2) => -0.5sd = -6
sd = -6/-0.5 = 12
From (1), mean = sd + 28 = 12 + 28 = 40
mean = 40
standard deviation = 12
B. 7 percent
I kind of did it backwards. I took the amount $38642. and multiplied it by each of the answers. The 7 percent is what gave me the $2704.94 amount.
His teacher didnt have time so advised him to tutor privately
