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3 years ago

Please help!

1 answer:

7 0

This may help :))

She worked 9 hours on store and gave piano lessons for 6 hours

Let x be the no. of hours she worked on store
Cost of 1 hour on shop = $8.47
Cost of x hours on shop = $8.47x
Let y be the no. of hours she gave piano lessons
Cost of 1 hour for piano lessons = $17
Cost of y hours on shop = $17y

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The difference of sample means of two populations is 108.7, and the standard deviation of the difference in sample means is 32.

charle [14.2K]

Answer: A. The difference of the two means is significant at the 68% confidence level, so the null hypothesis must be rejected.

Step-by-step explanation:

I just got it right on PLATO, so I know it’s 100% correct.

5 0

3 years ago

288 times 66 =?<br> Plz help

gtnhenbr [62]

19,008 I just used a calculator

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2 years ago

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3 years ago

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Jessie estimates the weight of her cat to be 10 pounds. The actual weight of the cat is 13.75 pounds. find the percent error.

romanna [79]

Answer:

$\large \boxed{27 \, \%} }$

Step-by-step explanation:

$\begin{array}{rcl}\text{Percent error}&= &\dfrac{\lvert \text{Measured - Actual}\lvert}{ \text{Actual}} \times100 \,\%\\\\& = & \dfrac{\lvert 10 - 13.75\lvert}{13.75} \times 100 \, \% \\\\& = & \dfrac{\lvert -3.75\lvert}{13.75} \times 100 \, \%\\ \\& = & \dfrac{3.75}{13.75} \times 100 \,\%\\\\& = & 0.27 \times 100 \, \%\\& = & \mathbf{27 \, \%}\\\end{array}\\\text{The percent error is $\large \boxed{\mathbf{27 \, \%} }$}$

3 0

3 years ago

Help, this is so confusing.

Mnenie [13.5K]

Answer:

D. $0.05

Step-by-step explanation:

Don't worry! I'll help you through it.

So we just have to find the unit rate (price) per apple.

$4 divided by 5lbs bag = $0.80 so, The 1st bag is $0.80 an apple.

$6 bag divided by 8lb = $0.75 an apple.

Now, simply subtract

0.80

-0.75

0.05

So your answer is D, $0.05

Have a great day!

~PumpkinSpice1

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3 years ago

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