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Nikitich [7]
4 years ago
15

An extensive study conducted in 1980 concluded that the mean mercury level in oysters from the White Bear estuary was 0.017 part

s per million (ppm) with a standard deviation ppm. In 2012, a sample of 43 oysters from the same estuary exhibited a mean mercury concentration of .
Mathematics
1 answer:
trapecia [35]4 years ago
4 0

Answer:

0.00039534883

Step-by-step explanation:

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The ratio of the profit, material cost and production labour of an article is 5:7:13.
IRINA_888 [86]

Answer:

The cost of producing the article is -3500 (Negative cost)

Step-by-step explanation:

The given parameters are

The ratio of the profit to material cost to production labor = 5:7:13

The amount of the material cost = 840 + Labor cost

Let the total cost = X

Therefore, we have;

The fraction of the total cost that is material cost = 7/(5 + 7 + 13) = 7/25

Therefore, the material cost = 7/25 × X

The fraction of the total cost that is labor cost = 13/(5 + 7 + 13) = 13/25

Therefore, the labor cost = 13/25 × X

However, the amount of the material cost = 840 + Labor cost, which gives;

7/25 × X = 13/25 × X + 840

7/25 × X - 13/25 × X = 840

-6/25 × X= 840

X = 840/(-6/25) = 840×(-25/6) = -3500

The cost of producing the article = -3500.

8 0
3 years ago
Helpppp. I don’t understand
Pie
Multiply 2^(-5) by 2^6.  The correct result is 2^1, or just 2 (inches).
7 0
3 years ago
A boy borrowed his boat 531 feet out into the ocean. When he looked back he saw the house on a cliff above the beach where he se
Ludmilka [50]

Answer:

259 ft.

Step-by-step explanation:

A triangle is a polygon with three sides and three angles. Types of triangles are isosceles. scalene, equilateral, acute, obtuse and right angled triangle.

A right angled triangle is a triangle in which one of the angles is 90 degrees. Trigonometric ratios show the relationship between the angles of a right angle triangle and its sides.

Let h represent the height of the house above water, hence using trigonometric ratios:

tan(26) = h / 531

h = 531 * tan(26)

h = 259 ft.

8 0
3 years ago
To solve for m in the formula , use the multiplication property of equality. 1)True or 2) False?
NeX [460]
True.  just like Texaschic101 said DV= M
3 0
3 years ago
Read 2 more answers
Ned pours 7 2/5 ounces of water from a beaker contains 10.25 ounces . How much water is left?
coldgirl [10]

2/5 = 0.4 as a decimal.

Now subtract:

10.25 - 7.4 = 2.85 ounces are left

8 0
3 years ago
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