D because rational numbers CAN be negative
Th owner must buy 7 Jackets
Step-by-step explanation:
a. Purchase price=$55 , Sell Price= $77
Sell Price = $55+$22
= Purchase price + 40*55/100
=Purchase price + 40% of Purchase price
=140% of purchase price
b. Purchase Price=$35
Sell price=140%of $35
=140*$35/100
=$49
Number of Jackets required for the total sale to be $340 = $340/$49
=6.94
So We get the result by rounding off because Jackets cannot be in fraction, which is 7
Answer:
Suppose the heights of 18-year-old men are approximately normally distributed, with mean 71 inches and standard deviation 4 inches.
(a) What is the probability that an 18-year-old man selected at random is between 70 and 72 inches tall? (Round your answer to four decimal places.)
z1 = (70-71)/4 = -0.25
z2 = (72-71/4 = 0.25
P(70<X<72) = p(-0.25<z<0.25) = 0.1974
Answer: 0.1974
(b) If a random sample of thirteen 18-year-old men is selected, what is the probability that the mean height x is between 70 and 72 inches? (Round your answer to four decimal places.)
z1 = (70-71)/(4/sqrt(13)) = -0.9014
z2 = (72-71/(4/sqrt(13)) = 0.9014
P(70<X<72) = p(-0.9014<z<0.9014) = 0.6326
Answer: 0.6326
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Answer:
example 7 x 3 means you add 7 3 times
Step-by-step explanation:
