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3 years ago

14

What are the coordinates

1 answer:

Paladinen [302]3 years ago

8 0

Hello :
(x+3)² +(y-5)² =25
<span> the coordinates the center of the circle is : (-3,5)</span>

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It took14 min to walk around the block 4times. What was her unit rate?

Luba_88 [7]

7.5 min per walk around the block

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2 years ago

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the area of the continent North America is about 9540000 square miles right 9540000 in expanded form using exponents to show the

VashaNatasha [74]

It would be 9.54x10^6 because the nine is 6 spaces away from the decimal point if you get what i mean.

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Use the points (2,-5) and (-1,4) and determine the slope using the slope formula

Rama09 [41]

(2,-5),(-1,4)
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2 years ago

Susan Johnson earns a yearly salary of $83,280. a. How much would Susan be paid if she were

Umnica [9.8K]

Just divide the 83,280 by 12, when you do that you get 6940. So 6940 is how much she makes per month then you take that 6940 and divide it by 4 to get what she makes per week, when you do that you get 1735.

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5 0

2 years ago

supervisor records the repair cost for 25 randomly selected dryers. A sample mean of $93.36 and standard deviation of $19.95 are

Simora [160]

<h2><u>Answer with explanation:</u></h2>

The confidence interval for population mean (when population standard deviation is unknown) is given by :-

$\overline{x}-t^*\dfrac{s}{\sqrt{n}}< \mu$

, where n= sample size

$\overline{x}$ = Sample mean

s= sample size

t* = Critical value.

Given : n= 25

Degree of freedom : $df=n-1=24$

$\overline{x}= \$93.36$

$s=\ $19.95$

Significance level for 98% confidence interval : $\alpha=1-0.98=0.02$

Using t-distribution table ,

Two-tailed critical value for 98% confidence interval :

$t^*=t_{\alpha/2,\ df}=t_{0.01,\ 24}=2.4922$

⇒ The critical value that should be used in constructing the confidence interval = 2.4922

Then, the 95% confidence interval would be :-

$93.36-(2.4922)\dfrac{19.95}{\sqrt{25}}< \mu$

$=93.36-9.943878< \mu$

$=93.36-9.943878< \mu$

$=83.416122< \mu$

Hence, the 98% confidence interval for the mean repair cost for the dryers. = $83.4161$

4 0

2 years ago