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Marysya12 [62]
3 years ago
15

Suppose that a police officer measured the speed of cars on a highway for an hour. The average speed of the cars was 72 and the

standard deviation was 4.6. However, since the radar gun was biased, 0.9 is added to every observation in the dataset. What will the new mean be?
Mathematics
1 answer:
anygoal [31]3 years ago
8 0
I got 4.14 because i multiplied the deviation which is 4.6 by 0.9 and got that answer
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Sergio [31]
The first step for solving this is to cancel equal terms on both sides of the inequality.
- \frac{x}{2} < 0
Now multiply both sides of the inequality by -2 and flip the inequality sign.
-2 × (- \frac{x}{2}) > -2 × 0
Remember that multiplying two negatives together always equals a positive,, so the expression changes to the following:
2 × \frac{x}{2} > -2 × 0
Reduce the numbers with 2.
x > -2 × 0
Any expression multiplied by 0 equals 0,, so the correct answer to your question will be:
x > 0
Let me know if you have any further questions.
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Please help I’ll mark you as brainliest if correct
Alecsey [184]

Answer:

153.94 is your answer.

Step-by-step explanation:

I believe it would be the last one, but let me explain. So to find the area of a circle with just the diameter, the formula would be 1 /4 π d2. Which is one fourth times pie, multiplied with the diameter to the second power. So if we put 14 in the equation would look like this 1/4*π*14*2. So if we use this formula, we get 153.94. Or something close to that. I hope this helps! Good luck!! ;)

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