Answer: B $50,700
Step-by-step explanation: Subtract expenses from earnings...
65,000-4,900-7,400-2,000=50,700
Answer:
55 minutes
Step-by-step explanation
He started waiting at <u>12:35 P.M.</u> If we're assuming this is the same day, you're able to add the minutes until you get to <u>1:00 P.M.</u>, which is around 25 minutes. Afterwards, you need to <u>add</u> another 30 minutes to get to the train's time of arrival, which means you should get 55 minutes!
Hwy friend
Let's figure this out.
5+7+4+4= 20 total students
4/20 students have hazel eyes
6/20 students do not have hazel eyes
16 / 20 =.8
80% chance that 1 is not hazel
80% that the 2nd isn't hazel
To find the probability that both will not be hazel you must multiply:
80% by 80% (.8 * .8)
.8 *.8 = .64
There is a 64% chance both of the selected students wont have hazel eyes.
Step-by-step explanation:
Z-score is calculated by the following formula:
Z = (X-mu)/sigma
where
X = data value
mu = mean
sigma = standard deviation
Given:
mu = 500
sigma = 100
X = 680
Z-score = (X-mu)/sigma = (680-500)/100 = 180/100 = 1.8
Answer:
Step-by-step explanation:
Hello!
X: Cholesterol level of a woman aged 30-39. (mg/dl)
This variable has an approximately normal distribution with mean μ= 190.14 mg/dl
1. You need to find the corresponding Z-value that corresponds to the top 9.3% of the distribution, i.e. is the value of the standard normal distribution that has above it 0.093 of the distribution and below it is 0.907, symbolically:
P(Z≥z₀)= 0.093
-*or*-
P(Z≤z₀)= 0.907
Since the Z-table shows accumulative probabilities P(Z<Z₁₋α) I'll work with the second expression:
P(Z≤z₀)= 0.907
Now all you have to do is look for the given probability in the body of the table and reach the margins to obtain the corresponding Z value. The first column gives you the integer and first decimal value and the first row gives you the second decimal value:
z₀= 1.323
2.
Using the Z value from 1., the mean Cholesterol level (μ= 190.14 mg/dl) and the Medical guideline that indicates that 9.3% of the women have levels above 240 mg/dl you can clear the standard deviation of the distribution from the Z-formula:
Z= (X- μ)/δ ~N(0;1)
Z= (X- μ)/δ
Z*δ= X- μ
δ=(X- μ)/Z
δ=(240-190.14)/1.323
δ= 37.687 ≅ 37.7 mg/dl
I hope it helps!