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GaryK [48]
4 years ago
11

Out of a population of 1,500 students, 100 were asked by a random sampling to choose their favorite national park. Their respons

es are shown in the table below.
Using proportional reasoning, about how many students out of the 1,500 would you expect to pick Yosemite for their favorite national park?


____________ students

Mathematics
2 answers:
Lelechka [254]4 years ago
6 0

Answer:

210

Step-by-step explanation:

I just took the test got it right

fredd [130]4 years ago
5 0
Proportional reasoning involves comparing two values using a known proportion.

Here in a sample of 100 students, 14 students chose Yosemite as their favourite national park. This gives a proportion of 14 / 100 = 0.14 or 14%.

Using proportional reasoning, we will expect 14% of the population of 1,500 students to choose Yosemite as their favourite park.

Therefore, the number of<span> students out of the 1,500 that we would expect to pick Yosemite for their favorite national park</span>  is 14% 0f 1,500 = 0.14 x 1,500 = 210 students.
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Tom has 120 meters of fencing. He will use it to form three sides of a rectangular garden. The fourth side will be along a house
mezya [45]

Answer:

a) Function A(x) =  (60*x - 1/2*x²)

b)Side length     x = 60 m      the other side   y = 30 m

c) A (max)  = 1800 m²

Step-by-step explanation:

Area of rectangular garden with length  " x " and wide "y"

A = x*y        

Perimeter of rectangular area ( only three sides 2*y and 1*x)

P(r)  = 2*y + x

P(r) = 120 = 2*y + x

y = ( 120 - x ) /2

Area of the garden as function of x is

A(x) = [( 120 - x ) /2]*x          ⇒     A(x) = (60*x - 1/2*x²)

Taking derivatives on both sides of the equation:

A´(x) = 60 - x

A´(x)  = 0            60  -  x  = 0

x = 60 m

Then

y = ( 120  -  x ) / 2                ⇒   y = (120 - 60 )/2

y = 30 m

A(max) = 30 * 60

A(max) = 1800 m²

8 0
4 years ago
Tommy goes to Lowe's to buy some supplies for his yard. He buys 4 plants for n dollars, a 10-gallon bucket for $10, and a bag of
Step2247 [10]

Answer:

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Step-by-step explanation:

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  4n +10 + 18 = 4n +28

7 0
3 years ago
Converting from vertex to standard form <br><br>plzz help ;( ​
Trava [24]

Answer:

x²-4x+7

-x²-6x-12

Step-by-step explanation:

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We get x²-4x+4 and then just need to add three

x²-4x+7

2.)

We do the same thing (expand the exponent) and get x²+6x+9

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-(x²+6x+9)-3

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3 years ago
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lbvjy [14]

Ok, first let's find how much a nickle is worth, a nickle is worth $0.05.

0.05 x 27 = $1.35

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0.05 x 39 = $1.95

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3 years ago
Tina weighs 130 lb she enrolls in a fitness plan to reduce 10% of her body weight over a four month period. How many pounds did
Snowcat [4.5K]

Answer:

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