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Serga [27]
3 years ago
10

Ms.banks walks at about 3 feet per second how many miles per day could she travel is she walked without taking a break?

Mathematics
1 answer:
skad [1K]3 years ago
5 0

Answer:

About 49.09 miles a day .

Step-by-step explanation:

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a random sample of 510 high school students has a normal distribution. The sample mean average ACT exam score was 21 with a 3.2
34kurt

Answer:

CI = 21 ± 0.365

Step-by-step explanation:

The confidence interval is:

CI = x ± SE * CV

where x is the sample mean, SE is the standard error, and CV is the critical value (either t score or z score).

Here, x = 21.

The standard error for a sample mean is:

SE = σ / √n

SE = 3.2 / √510

SE = 0.142

The critical value is looked up in a table or found with a calculator.  But first, we must find the alpha level and the critical probability.

α = 1 - 0.99 = 0.01

p* = 1 - (α/2) = 1 - (0.01/2) = 0.995

Using a calculator or a z-score table:

P(x<z) = 0.995

z = 2.576

Therefore:

CI = 21 ± 0.142 × 2.576

CI = 21 ± 0.365

Round as needed.

8 0
3 years ago
a gallon of gas cost 2.96 a gallon your car has a 25 gallon gas tank and can travel 28.8 miles on each gallon how much would it
Stells [14]

$40.33, 25x3/8x2.96, good luck!

8 0
3 years ago
I need the reasoning?
morpeh [17]

Answer:

2. This is only true when x=-3.

3. This is only true when x=3.

4. This is only true when x=12.

5. This has no solution.

6. This has an infinite number of solutions.

6 0
2 years ago
What is the answer to -3 + -5
Margaret [11]

Answer:

-8

Step-by-step explanation:

5 plus 3 is 8 and since both numbers have a negative, it will all so be a negative

4 0
3 years ago
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Answer:

she saves 6.75 with the coupon

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2 years ago
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