154 text messages were sent
explanation:
0.25x+7=45.50
subtract 7 from both sides
0.25x=38.5
divide both sides by 0.25
x=154
154 text messages
Answer:
The answer is 3/2
Step-by-step explanation:
5/6+4/6= 9/6
simplified is 3/2
Answer:
15 dog heights;
Step-by-step explanation:
The formula to be used here is where:
- is the confidence level
- is the margin of error for a confidence level
- is the critical value for the confidence level
- is the population standard deviation
- is the sample size
We are given that:
To determine the minimum sample size, , we plug our given values into the formula and solve for
Don't forget to round up here! This means that actually.
Therefore, if we want to be 95% confident that the sample mean is within 1 inch of the true population mean, the minimum sample size that can be taken is 15 dog heights.
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Answer:
2
Step-by-step explanation: