Answer:7x+9=2
Step-by-step explanation:
7x(7 times a number) +(sum of) 9 =(is) 2
7x+9=2
Answer:
5 boxes have 60 candles
8 boxes have 96
If there are 120 candles there are 10 boxes
Step-by-step explanation:
TanA = SinA/CosA
tanA = 2xy / (x² + y²),
Sin A = CosA * 2xy / (x² + y²)
The missing values in the given question is shown below.
A tobacco company claims that the nicotine content of its "light" cigarettes has a mean of 1.5 milligrams and a standard deviation of 0.52 milligrams. What is the probability that 50 randomly selected light cigarettes from this company will have a total combined nicotine content of 81 milligrams or less, assuming the company's claims to be true? Carry your intermediate computations to at least four decimal places. Report your result to at least three decimal places.
Answer:
P(x ≤ 1.62) = 0.949 to three decimal places.
Step-by-step explanation:
From the question; given that:
The population mean = 1.5
The standard deviation = 0.52
The sample size n = 50
The sample mean = 1.62
Hence; we can calculate the required probability as:
From z - tables;
P(x ≤ 1.62) = 0.9486
P(x ≤ 1.62) = 0.949 to three decimal places.
Answer:
Approximately 39 times
Step-by-step explanation:
The light-rail service claims to be on time 98% of the time.
This means the probability that the light-rail service is on time is 0.98.
We want to calculate the number of times Jeanette will be on time if she takes the light trail 40 times.
This is the expected value.
We multiply the probability by the number of times she takes the trail.