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bagirrra123 [75]

3 years ago

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Kimi'sgraduationpicniccosts

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Two studies were completed in Florida. One study in northern Florida involved 2,000 patients; 64% of them experienced flulike sy

Naddika [18.5K]

Given:
Northern Florida: 2,000 patients ; 64% experienced flulike symptoms during December
Southern Florida: 3,000 patients ; 54% experienced flulike symptoms during December

Standard error = √[p(1-p)/n]

NF = √[0.64(1-0.64)/2000] = √[(0.64*0.36)/2000] = 0.0107 or 1.07%
SF = <span>√[0.54(1-0.54)/3000] = √[(0.54*0.46)/3000] = 0.0091 or 0.91%

smallest margin of error for a 95% confidence interval

NF: Em </span>≈ 0.98/√2,000 = 0.98/44.72 = 0.0219 or 2.19%
<span>SF: Em </span>≈ 0.98/√3,000 = 0.98/54.77 = 0.0178 or 1.78%
<span>
MY ANSWER:

</span><span>B.The southern Florida study with a margin of error of 1.8%.</span>

7 0

4 years ago

Read 2 more answers

The distance from town a to town b is 5 miles and the distance from town b to town c is 4 miles. which of the following could No

Radda [10]

A. 1 because a to b is 5 miles and b to c is 4 miles so it couldn't be 1 mile

6 0

3 years ago

If f(2x–1) = x+2, then what is the value of f⁻¹(2x–1)?

Anit [1.1K]

Answer:

So F(x+3) = (x+3+5)/2 = (x+8)/2

Step-by-step explanation:

Given F(2x-1) = x+2

Put 2x-1 = y=> x = (y+1)/2

Hence F(y) = (y+1)/2 +2 = (y+5)/2

So F(x) = (x+5)/2

So F(x+3) = (x+3+5)/2 = (x+8)/2.

7 0

4 years ago

Aaron tracks the time it takes him to mow lawns by writing coordinate points relating x, the time in hours it takes to mow a law

NARA [144]

Answer:

Slope of this line is given by:

<em>Aaron’s rate for mowing lawns is 0.5 acres per hour</em>

Step-by-step explanation:

It is given that time is tracked by Aaron related to x coordinate.

and the area of land mowed in acres is related to y coordinate.

Two of his points are given as:

(3, 1.5) and (5,2.5)

We know that the coordinates are represented in the form of (x,y)

i.e. first coordinate represents x coordinate and

second coordinate represents y coordinate.

So, it can be observed that:

$x_1=3, y_1=1.5\\x_2=5, y_2=2.5$

Change in x coordinate = $x_2-x_1=5-3 = 2$

i.e. total time taken is 2 hours.

Change in y coordinate = $y_2-y_1=2.5-1.5 = 1$

i.e. total land mowed taken is 1 acre.

In other words, <em>it takes 2 hours for Aaron to mow 1 acre of land.</em>

So, "option 1) It takes Aaron about 1 hour to mow 2 acres." is incorrect.

<u>Rate of mowing</u> lawn is the <em>land mowed by Aaron in 1 hour</em>.

Land mowed in 2 hours = 1 acre

Land mowed in 1 hours = $\frac{1}{2}$ acre i.e. 0.5 acre

Also, slope of a line is given as:

$m = \dfrac{y_2-y_1}{x_2-x_1}$

Here $y_2 - y_1 = 1$

$x_2 - x_1 = 2$

As per formula:

$m = \dfrac{1}{2} = 0.5$

So, option 2) Aaron’s rate for mowing lawns is 0.5 acres per hour.

6 0

4 years ago

Read 2 more answers

Tickets for a play at the community theater cost $8 for children and $20 for adults. A total of 300 tickets have been sold for $

salantis [7]

Answer:

125 adults

175 children

Step-by-step explanation:

3900=8c+20a

300=c+a

c=300-a

substitute

3900=8(300-a)+20a

reduce

3900=2400-8a+20a

1500=12a

a=125 adults

substitute for a

c=300-a

c=300-125

c=175 children

8 0

3 years ago