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STatiana [176]
1 year ago
11

Maria makes $8.55 an hour working at the jewelry store. Her paycheck shows that she worked 32.5 hours over the past week. How mu

ch money did Maria make? (Rounded to the nearest cent)
Mathematics
1 answer:
raketka [301]1 year ago
3 0

Answer:

277.88

Step-by-step explanation:

\mathrm{Multiply\:without\:the\:decimal\:points,\:then\:put\:the\:decimal\:point\:in\:the\:answer}

855\cdot \:325=277875

8.55\mathrm{\:has\:}2\mathrm{\:decimal\:places}\\32.5\mathrm{\:has\:}1\mathrm{\:decimal\:place}\\\mathrm{Therefore,\:the\:answer\:has\:}3\mathrm{\:decimal\:places}\\=277.875

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Dahasolnce [82]
The formula for the confidence interval is given by

Sample mean + z*[σ/√n], and
Sample mean - z*[σ/√n]

We have:
Sample mean = 23.95
n = 40 
σ = 2.55
z* for 99% confidence = 2.58

Substitute these values into the formula, we have

23.95 + (2.58)(2.55÷√40) = 24.99
23.95 - (2.58)(2.55÷√40) = 22.91

So the lower interval is 22.91 and the highest interval is 24.99
5 0
3 years ago
Please help, i dont understand an ounce of this
nignag [31]

Let x be the length of each side of the nonagon. We then split up the nonagon into 9 congruent, isosceles triangles, each with base = x and height = 12. Then the area of each triangle is 1/2 • x • 12 = 6x, so the total area of the nonagon will be 9 • 6x = 54x.

To find x, we can use some facts from geometry and trigonometry.

• In any polygon, the sum of the measures of the exterior angles is 360°. So each of these exterior angles will measure 360°/9 = 40°.

• Exterior angles are supplementary to the interior angles. So each interior angle will measure 180° - 40° = 140°.

• Each of the 9 triangles are isosceles with base angles measuring half the interior angles of the nonagon, 140°/2 = 70°.

• Cut the triangle in half along the labeled inradius of the nonagon, which has length 12. In the resulting right triangle, we have

tan(70°) = 12 / (x/2)

and solving for x gives

tan(70°) = 24/x

x = 24/tan(70°)

x = 24 cot(70°) ≈ 8.7

Then the total area of the nonagon is

54x = 54 • 24 cot(70°) ≈ 471.7

4 0
2 years ago
Help me find N and get this right​
disa [49]

Answer:

N = 18

Step-by-step explanation:

The triangles are similar, thus the ratios of corresponding sides are equal, that is

\frac{5}{15} = \frac{6}{N} ( cross- multiply )

5N = 90 ( divide both sides by 5 )

N = 18

5 0
3 years ago
Help plis! Someone I need help with this plis
ipn [44]

Answer:

I think the answer is B

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2 years ago
Doing 1 week at Jackson School 210 students buy milk and 196 students by twos how many drinks are sold that week
icang [17]
210 plus 196 which would be 406
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