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2 years ago

I need some help with my homework so may someone help me not in a rush just need this done

Mathematics

1 answer:

Paladinen [302]2 years ago

6 0

Answer:

-25

Step-by-step explanation:

First he bought 3 tires which total costed 105, then returned 2, so he got $70 back, meaning he had $35. Then he found 2 $20 bills, which raised his total to $75. Then, he bought a phone for $90, so he has -25 dollars left

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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

4:n=6:9 how do you get it?

MAVERICK [17]

Answer:

3.1

Step-by-step explanation:

7 0

3 years ago

How do you rationalise this surd?

Ksivusya [100]

$\frac{1 + \sqrt{3} }{ \sqrt{2} } \times \frac{ \sqrt{2} }{ \sqrt{2} } = \frac{ \sqrt{2} + \sqrt{6} }{2}$
here you go

5 0

2 years ago

Read 2 more answers

HELP ME! @all smart people

larisa86 [58]

The first one is 5.3 you multiply 4x4 which is 16 then divide by 3 which then gives you the answer

6 0

2 years ago

Read 2 more answers

a soccar team spent $55 dollars on supplies for a car wash then earned $275 whats their total after paying for supplies

IrinaK [193]

To find what profit they made, subtract what they earned from what they spent money on. 275-55=220. They made a total of $220 after paying for supplies. I hope this helps! :)

8 0

3 years ago