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3 years ago

NEED HELP ASAP! PLEASE EXPLAIN! SO CONFUSED!

Mathematics

2 answers:

agasfer [191]3 years ago

7 0

Answer:

A 15

Step-by-step explanation:

inna [77]3 years ago

3 0

Answer:

A. f(25) = 15

Step-by-step explanation:

there are three functions given,

1st.

3√x .............replace x with 25 cause f(25)

3√25

3*5

15 ......given that x≥9, so 15 falls above 9 and is correct

2nd.

-| 2x |

-| 2(25) | .....replace x here as well

- |50|

-50 .......given that 0<x<9, but it doesn't fall between 0 and 9 so wrong.

3rd.

13 .......given x≤0, 13 doesn't fall under or equal to 0 but is above so wrong.

Therefore can be concluded answer is 15

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Answer:

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Step-by-step explanation:

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3 years ago

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3 years ago

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Hatshy [7]

Answer:

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Step-by-step explanation:

We have to construct a 99% confidence interval for the mean.

A sample of n=7 males is taken. We know the sample mean = 315 watts and the sample standard deviation = 16 watts.

For a 99% confidence interval, the value of z is z=2.58.

We can calculate the confidence interval as:

$M-z\sigma/\sqrt{n}\leq\mu\leq M+z\sigma/\sqrt{n}\\\\315-2.58*16/\sqrt{7}\leq\mu\leq 315+2.58*16/\sqrt{7}\\\\315-15.6\leq \mu\leq 315+15.6\\\\299.4\leq\mu\leq 330.6$

The 99% confidence interval for the mean peak power after training is [299.4, 330.6]

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3 years ago

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murzikaleks [220]

Answer:

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Step-by-step explanation:

1.0m

0.5m

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2.7m - answer

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3 years ago

NEED HELP ASAP! PLEASE EXPLAIN! SO CONFUSED!​

NEED HELP ASAP! PLEASE EXPLAIN! SO CONFUSED!