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777dan777 [17]
3 years ago
7

A group of volunteers are helping to create a community garden. the project should take 200 hours of work. if v represents the n

umber of volunteers and each volunteer works only eight hours which equation could be used to determine how many volunteers are needed to finish the project
8=200/v
v=200×8
200=8/v
8=200×v
Mathematics
1 answer:
blondinia [14]3 years ago
5 0
I think the answer is 8=200/v
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The data given below consists of the number of children with food allergies at a sample of elementary schools: 3, 9, 5, 5, 14, 1
Mice21 [21]

Answer:

z -score = 0.0459

Step-by-step explanation:

Given that:

the number of children with food allergies at a sample of elementary schools: 3, 9, 5, 5, 14, 10, 5, 11, 9, 6, 1, 8, 10, 7, 9, 13, 18, 9, 8, 11, 9, 7, 6, 14, 12.

The objective is to find the z- score , but before we can do that , we need to determine the mean and the standard deviation of the sample.

Mean = sum of the sample/ total number of the sample

Mean = (3+9+ 5+ 5+ 14+ 10+ 5+ 11+ 9+ 6+ 1+ 8+ 10+ 7+ 9+13+ 18+ 9+ 8+11+ 9+ 7+ 6+ 14+ 12)/25

Mean = 219/25

Mean = 8.76

Standard deviation = \sqrt{\dfrac {\sum (x_i - \mu)^2}{N}}

Mean (in order )= 1, 3,5,5,5,6,6,7,7,8,8,9,9,9,9,9,10,10,11,11,12,13,14,14,18)

Standard deviation = \sqrt{\dfrac { (8.76 - 1)^2}{25} + \dfrac { (8.76 - 3)^2}{25} +\dfrac { (8.76 - 5)^2}{25} +...+ \dfrac { (8.76 - 18)^2}{25}   }

Standard deviation = 5.2174

The standard z score formula is:

z = \dfrac{X- \mu}{\sigma}

where X = median (13th observation ) = 9

z = \dfrac{9- 8.76}{5.2174}

z = \dfrac{0.24}{5.2174}

z -score = 0.0459

4 0
3 years ago
NO LINKS!!! Find the area of the shaded figure shown. Part 3.#16 & 17. Show work please.
RideAnS [48]

#17

Area of rectangle

  • 20(21)
  • 420m²

Diameter of circle

  • √21²+20²
  • √400+441
  • √841
  • 29m

Radius=29/2=14.5m

Area

  • π(14.5)²
  • 660m²(approx)

Area of shaded region

  • 660-420
  • 240m²

#17

Area of circle

  • π(16/2)²
  • 64π
  • 200.96ft²

Side of square(Let it be s)

Use Pythagorean theorem

  • s²+s²=16²
  • 2s²=16²
  • s²=256/2
  • s²=128

Area of square

  • s²
  • 128ft²

Area of shaded region

  • 200.96-128
  • 72.96ft²
4 0
2 years ago
Read 2 more answers
The tallest man alive today is 8 feet 3 inches. How tall is he in inches?
juin [17]

Answer:

99 inches

It should be correct, you can try and double check with goo gle though.

6 0
3 years ago
Read 2 more answers
a parallelogram has one angle that measures 40 what are the measures of the other three angles in the parallelogram
stiv31 [10]

Answer:

40°, 140°, and 140°

Step-by-step explanation:

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3 years ago
The area of a square poster is 26 in 2 find the length of one side of the poster to the nearest 10th of an inch
Juli2301 [7.4K]
5.1 in
Since the area of a square is s^2, you can take the square root of 26 to find the answer
5 0
3 years ago
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