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3 years ago

Thx for ur help click on oic

Mathematics

1 answer:

MrRa [10]3 years ago

7 0

Answer:

She paid = $33

Step-by-step explanation:

First we need to find the new price after markup

The original price is 15

100% markup means double the price

New price = original price + original price * mark up rate

=15 + 15 * 1.00

=30

New price is 30

Now we need to find the sales tax, which is the price times the tax rate

sales tax = 30* .10

= 3

The final cost = price + sales tax

= 30 +3

= 33

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Construct a confidence interval of the population proportion at the given level of confidence. x = 125, n = 250, 90 % confidence

madam [21]

Answer: 90% confidence interval would be (0.448, 0.552).

Step-by-step explanation:

Since we have given that

x = 125

n = 250

So, $\hat{p}=\dfrac{x}{n}=\dfrac{125}{250}=0.5$

We need to find the 90% confidence interval.

so, z = 1.64

So, interval would be

$\hat{p}\pm z\sqrt{\dfrac{\hat{p}(1-\hat{p})}{n}}\\\\=0.5\pm 1.64\sqrt{\dfrac{0.5\times 0.5}{250}}\\\\=0.5\pm 0.0519\\\\=(0.5-0.0519,0.5+0.0519)\\\\=(0.448,0.552)$

Hence, 90% confidence interval would be (0.448, 0.552)

3 0

4 years ago

The correct answer will be marked as brainliest ! Please help me

Oksana_A [137]

The answer is D. It's always Rise over Run. So the slope would be 2/1 Or 2.

7 0

3 years ago

Find the value of x. Plz hurry

WITCHER [35]

Answer:

x = 12

Step-by-step explanation:

both (x+5) and (2x-7) are corresponding angles formed by an intersection between a transversal and 2 parallel lines.

hence they are equal in value

x+5 = 2x-7

x - 2x = -7 - 5

-x = -12

x = 12

5 0

3 years ago

On a trolley ride around an amusement park, a child traveled from one signpost to a second signpost at a constant speed of 125 m

Feliz [49]

Answer:

If a child took just one minute, distance is less than 0,8 km

Step-by-step explanation:

speed= 125 m/min = 0,125 km/min,

distance=0,8 km

time= 0,8 km / 0,125 km/min = 6,4 min.

5 0

4 years ago

During the Little League state tournament, there were 1,980 fans at the first game. At the second game, there were 2,540 fans. W

kkurt [141]

Answer:

4520 Fans

Step-by-step explanation:

1980

+ 2540

-------------

4520

4 0

3 years ago