The percentage of young adults send between 128 and 158 text messages per day is; 34%
<h3>How to find the percentage from z-score?</h3>
The distribution is approximately Normal, with a mean of 128 messages and a standard deviation of 30 messages.
We are given;
Sample mean; x' = 158
Population mean; μ = 128
standard deviation; σ = 30
We want to find the area under the curve from x = 248 to x = 158.
where x is the number of text messages sent per day.
To find P(158 < x < 248), we will convert the score x = 158 to its corresponding z score as;
z = (x - μ)/σ
z = (158 - 128)/30
z = 30/30
z = 1
This tells us that the score x = 158 is exactly one standard deviation above the mean μ = 128.
From online p-value from z-score calculator, we have;
P-value = 0.34134 = 34%
Approximately 34% of the the population sends between 128 and 158 text messages per day.
Read more about p-value from z-score at; brainly.com/question/25638875
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An adaptation that might<span> help a plant survive in an environment with cold winters is developing pine needles or losing leaves during such periods of time.</span>
Answer:
A is the answer
Step-by-step explanation:
3*30 is 90 2*30 is 60 and x*30 is 30 which means 90+60+30 equals 180
The area of the circular fire pit is 4096 square inches.
Explanation:
Given that the rectangular fire pit is 7 feet by 6 feet.
We need to determine the area of the largest circular fire that can be made in this fire pit.
The diameter of the circular fire is 6 feet
The radius is given by
Radius is 3 feet.
The area of the largest circular fire pit can be determined using the formula,
Substituting the values in the formula, we have,
We need to convert feet to inches by multiplying by 12, we get,
Rounding off to the nearest square inch, we get,
Thus, the area of the circular fire pit is 4096 square inches.
Answer:
1/5 do not study french because change 2/3 to 2/5 and 2/5 study language with 1/5 left so add 2/5 + 1/5= 3/5
