Answer:
The probability of finding a sample mean less than 18 hours is 0.0082
Step-by-step explanation:
To find the probability of finding a sample mean less than 18 hours, we need to calculate the z-score of this sample mean 18. And the probability of finding a sample mean less than 18 hours is P(z<z(18)).
Z-score can be calculated as follows:
z(18)=
where
- X is the sample mean (18 hours)
- M is the average hours dentists spend per week on fillings (20 hours)
- s is the standard deviation (10 hours)
- N is the sample size (144)
Putting the numbers, we get:
z(18)=
Using z- table we can find that P(z<z(18)) = 0.0082
Factors of 26: <u>1</u>, <u>2,</u> 13, 26 (1 × 26, 2 × 13)
Factors of 42: <u>1</u>, <u>2</u>, 3, 6, 7, 14, 21, 42 (1 × 42, 2 × 21, 3 × 14, 6 × 7)
The greatest common factor they have is 2
The Answer is: 12 weeks
You just take 300/25 and you get the weeks
Answer:
10/3
Step-by-step explanation:
hope that helps
The equation that best represents the relationship between
the number of loaves of bread which is denoted by b and the number of cups of
bananas which is denoted by c is c = 2 1/4b.
We know that we need 11 ¼ cups of bananas is needed to make
5 loaves of bread.
We need to divide 11 ¼ to 5 which the answer is 2 ¼. The 2 ¼
represents how many cups is needed to make 1 loaf of bread.
