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docker41 [41]
3 years ago
13

In a random sample of 97 women at a company, the mean salary is $45,902 with a standard deviation of $3865. In a random sample o

f 75 men at the company, the mean salary is $48,454 with a standard deviation of $6677. Which interval is the 95% confidence interval for the difference between the mean salaries of all women and men at the company?
A) ($1133.20, $3970.80)
B) ($856.36, $4247.64)
C) ($1686.88, $3417.12)
D) ($319.99, $4784.01)
Mathematics
1 answer:
Delicious77 [7]3 years ago
8 0

Answer:

c

Step-by-step explanation:


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The arm of a steel crane is 62 feet long. When it is fully extended, the crane arm forms a 30 degree angle with a line parallel
yuradex [85]

Answer: The top of the Crane is 31 feet above the ground.

Step-by-step explanation:

When it is fully extended, the crane arm forms a 30 degree angle with a line parallel to the ground. This means that a right angle triangle is formed. The length of the Crane's arm represents the hypotenuse. The horizontal distance represents the adjacent side of the right angle triangle. The distance, h of the top of the Crane from the ground represents the opposite side of the right angle triangle.

To determine h, we would apply

the Sine trigonometric ratio.

Sin θ, = opposite side/hypotenuse. Therefore,

Sin 30 = h/62

h = 62Sin30

h = 62 × 0.5

h = 31 feet

3 0
3 years ago
Meg conducted a survey of four school cafeterias to find the number of students who like sandwiches for lunch. The results of he
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C. 38.46%       To get your answer you divide the number of students who liked sandwiches by total number of students in the cafeteria.   Example:  10/26=.3846 which is 38.46%
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3 years ago
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Mason breaks on average 1.5 pencils each day. How many pencils will he break in a school week?
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Answer:

how long is the school week??

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Walter asks to borrow $5 from Sharon on Monday, and another $8 on Tuesday. If he pays back $6 on Wednesday and borrows another $
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Answer:

$12 is owed

Step-by-step explanation:

5 + 5 + 8 = 18

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4 0
3 years ago
(b) Expand (4 + x)½ up to the forth term using the binomial expansion​
Serga [27]

Answer:

2±1\2x

Step-by-step explanation:

[4±x]1\2

we will start by opening the brackets

[4]1\2=2

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2±1\2x

hope am right

4 0
3 years ago
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