Answer:
a) 0.194
b) $440.8
Step-by-step explanation:
We are given the following information in the question:
Mean, μ = $9.40
Standard Deviation, σ = $4.40
Formula:
Standard error due to sampling =
a) P(tips from 40 parties > $400)
Thus, the average pay is
P(x > 10)
Calculation the value from standard normal z table, we have,
b) We have to find the value of x such that the probability is 0.01
Calculation the value from standard normal z table, we have,
Thus, the mean tip is $11.02
Tip for 40 parties =
Thus, he earns $440.8 on the best 1% of such weekends.
Answer:
See attached photo.
Step-by-step explanation:
x = -2y^2 + 4y + 2
Answer:
(-45j+-9k)
Step-by-step explanation:
-9 x 5j = -45j
-9 x k = -9k
(-45j+-9k)
Answer:
c 17000 mowers
Step-by-step explanation:
y = 5500 ln (9t+4)
y is the number of mowers sold
t is the number of years
Substitute 2 in for t to find the number of mowers sold after 2 years
y = 5500 ln (9*2+4)
= 5500 ln (18+4)
= 5500ln(22)
17000.7334934707
Round to the nearest hundread
17000
60............. what this doesn't make sense