Answer:
22.5
Step-by-step explanation:
Using PEMDAS, we know that for expressions such as this, we're supposed to multiply before we add. This means that it should look something like this: (3.3 x 2.5) + (5.7 x 2.5). When you solve the multiplication first, you get 8.25 + 14.25. Solve, and you get 22.5. This problem can be solved using any basic calculator, or scratch paper!
8n. 8 represents the number of hours she sleeps, and n represents the number of night she sleeps.
Answer
the one on the opposite side of the 137 is 137. the other part of that is 43 and 43. on the bottom one it is 117 on the obtuse angles and 53 on the acute angles. I hope this helps and doesn't sound crazy. I cannot remember the terms. I learned it a couple months ago.
Step-by-step explanation:
The probability that the sample mean is less than 30 school days will be given as follows:
the z-score is given by:
z=(x-μ)/σ
where
μ- stand deviation
σ-mean
thus the z-score of our information is:
z=(30-28)/9
z=0.222222
hence the probability that the sample mean is less than 30 will be:
P(x<30)=0.5871~58.71%
