Answer:
Option a) A 95% confidence interval for the mean diameter of the 120 bearings in the sample is 
.
Step-by-step explanation:
We are given the following information in the question:
Sample size, n = 120
Sample mean = 10 mm
Standard Deviation = 0.24 mm
Formula:
Hence, the correct interpretation for the confidence interval is given by option a).
A 95% confidence interval for the mean diameter of the 120 bearings in the sample is .
We have to consider the factor of sampling of 120 ball bearings from a population of 10,000 ball bearings.
90 = 2 · 3 · 3 · 5 = 2 · 3² · 5¹
If n has the form
and
is an integer, then greatest possible value of n = 3² · 5¹ =
45
Answer:
Carmen is $ 27, Henry is $ 80, and Goran is $ 20.
Step-by-step explanation:
be Carmen's money "c", Goran's "g" and Henry's "h"
Now, we organize the equations and we are left with:
c + g + h = 127
h = 4 * g
c = g + 7
replacing in the main one we have:
g + 7 + g + 4 * g = 127
6 * g = 127 - 7
g = 120/6
g = 20
now replacing:
h = 4 * 20 = 80
c = 20 + 7 = 27
therefore, Carmen is $ 27, Henry is $ 80, and Goran is $ 20.
Answer:
392 minutes
Step-by-step explanation:
Leticia made a mistake in her step 2. She did subtraction before multiplication.
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<h3>How to simplify an expression?</h3>
The expression can be simplified as follows;
4.5 ÷ 0.25 + 2.5 - 0.75 × 8
Hence, using Pemdas rule,
4.5 ÷ 0.25 + 2.5 - 0.75 × 8
18 + 2.5 - 0.75 × 8
18 + 2.5 - 6 = 14.5
Therefore, she made mistake in her step 2 because she was suppose to solve the multiplication before subtraction.
learn more on expression here: brainly.com/question/13545210
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