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2 years ago

Need help with this one

Mathematics

2 answers:

Sati [7]2 years ago

7 0

Answer:

Step-by-step explanation:

romanna [79]2 years ago

5 0

Answer:

The last one I think

Step-by-step explanation:

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Nico did 42 push-ups in 3 minutes.

Luda [366]

Answer:

14 pushups per min

70 pushups in 5 min

Step-by-step explanation:

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2 years ago

An article in Medicine and Science in Sports and Exercise "Maximal Leg-Strength Training Improves Cycling Economy in Previously

Hatshy [7]

Answer:

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

$299.4\leq\mu\leq 330.6$

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]

5 0

2 years ago

The point (2,-5) is on the graph of which equation?

elena55 [62]

The answer is A,
if you plug in the points of (2,-5) into
y=x-7
-5=2-7
-5=-5
so the equation is true

8 0

2 years ago

Read 2 more answers

1/2÷2/5=what's the answer?

Digiron [165]

1.25 is the answer....

3 0

2 years ago

Read 2 more answers

9× 3 1/2= Which choice is the most reasonable answer?

icang [17]

Answer:

31.5 or 63/2

Step-by-step explanation:

to do this, first you need to transform the mixed number (3 1/2) into an improper fraction, to get 7/2.

then you just multiply 9 by 7/2

9/1 (7/2)

63/2 = 31.5

both of the answers in bold are correct

8 0

3 years ago