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Leto [7]
3 years ago
10

Find the circumference and the area Of the circle with diameter 9ft

Mathematics
1 answer:
Irina-Kira [14]3 years ago
6 0

Answer:

Circumference is 28.26 ft

Area is 14.13 ft^2

Step-by-step explanation:

9×3.14=28.26

9/2=4.5

4.5×3.14=14.13

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A nutrition laboratory wants to construct a 95% confidence interval for the mean sodium content of "reduced sodium" hot dogs. A
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Answer:

n > 96

Therefore, the number of samples should be more than 96 for the width of their confidence interval to be no more than 10mg

Step-by-step explanation:

Given;

Standard deviation r= 25mg

Width of confidence interval w= 10mg

Confidence interval of 95%

Margin of error E = w/2 = 10mg/2 = 5mg

Z at 95% = 1.96

Margin of error E = Z(r/√n)

n = (Z×r/E)^2

n = (1.96 × 25/5)^2

n = (9.8)^2

n = 96.04

n > 96

Therefore, the number of samples should be more than 96 for the width of their confidence interval to be no more than 10mg

6 0
3 years ago
there are 200 end of the year school dance tickets students who have perfect attendance are able to presage them in advance if 1
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200 - 18 = 182
182 is the answers
3 0
3 years ago
Rhianna has a spinner, which is divided into four equal parts. The parts are numbered 1, 2, 3, and 4. If Rhianna spins the spinn
Makovka662 [10]

Answer:

The bottom table.

Step-by-step explanation:

It's the only one that shows options for heads and tails for every number.

4 0
3 years ago
Read 2 more answers
Larry makes sandwiches for lunch everyday. he can make 5 sandwiches with every 3 tomatoes he buys. if he bought 9 tomatoes, how
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15 sandwiches
3 tomatoes= 5 sandwiches.
So if there's 9, that makes 3 groups of 3 tomatoes which would make 3x5 or 5+5+5 ;-;
15.





6 0
3 years ago
In 19951995​, there were 41 comma 43141,431 shopping centers in a certain country. in 20052005​, there were 48 comma 72948,729.
Natali5045456 [20]
The first thing you should do for this case is to use the following table to perform the equation of a line:
 y x
 41,431 1995
 48,729 2005
 We have then that the line that best fits this data is
 y = 729.8x - 1E + 06
 Then, to know in what year the number of shopping centers reaches 80,000 we must replace this number in the equation of the line and clear x:
 80000 = 729.8x - 1E + 06
 Clearing x
 x = (80000 + 1E + 06) / (729.8) = 1479.857495
 nearest whole number
 1480
 This means that after 1480 years, 80000 shopping centers are reached.
 Equivalently, this amount is reached in the year:
 1480 + 1995 = 3475
 In the year 3475
 answer
 (a) y = 729.8x - 1E + 06
 (b) In the year 3475
6 0
3 years ago
Read 2 more answers
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