Answer:
b. What is the probability that a randomly selected person spent between $9 and $21?=0.3608
The probabilities regarding a person spending are given as follows:
a) More than 28: 0.2033 = 20.33%.
b) Between 9 and 21: 0.3608 = 36.08%.
The z-score of a measure X of a variable that has mean symbolized by and standard deviation symbolized by is obtained by the rule presented as follows:
The mean and the standard deviation for this problem are given as follows:
The probability of a person spending more than 28 is one subtracted by the p-value of Z when X = 28, hence:
Z = (28 - 23)/6
Z = 0.83
Z = 0.83 has a p-value of 0.7967.
1 - 0.7967 = 0.2033 = 20.33%.
The probability of spending between 9 and 21 is the p-value of Z when X = 21 subtracted by the p-value of Z when X = 9, hence:
Z = (21 - 23)/6
Z = -0.33
Z = -0.33 has a p-value of 0.3707.
Z = (9 - 23)/6
Z = -2.33
Z = -2.33 has a p-value of 0.0099.
Hence:
0.3707 - 0.0099 = 0.3608 = 36.08%.
More can be learned about the normal distribution at brainly.com/question/25800303
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The least common multiple that is divisible by both a and b is the smallest positive integer. The LCD between these two fractions 4/9 and 2/3 is 9.
The least common multiple that is divisible by both a and b is the smallest positive integer, lowest common multiple, or smallest common multiple of two numbers a and b, generally indicated by LCM.
The LCD of two fractions is the LCM of the denominator of the fractions.
Since the denominator of the two fractions is 3 and 9. Therefore, the LCM of the two denominators are,
LCM = 9
Hence, the LCD between these two fractions 4/9 and 2/3 is 9.
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Answer: Least common denominator = 9
Step-by-step explanation:
The LCD is the lowest multiple of the denominators
9 is a multiple of 1 × 9 or 3 × 3. So since 3 is the denominator of 2/3, 9 is the LCD.
2/3 is equivalent to 6/9.
Answer:
The answer is B
Step-by-step explanation:
✌
Answer:
B
Step-by-step explanation:
You can substitute the variables for the values!
7x = 21
3y = -6
2x = 6
y = -2
21 - (-6)
----------
6 + (-2)
27
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4
or
False
Answer:
I think the answer is false I am not A 100%sure but most likely false
Step-by-step explanation: