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ValentinkaMS [17]
3 years ago
14

At a county fair 9 people out of 1000 earned a perfect score in a carnival game what decimal represent the number of people who

earned a perfect score
Mathematics
2 answers:
coldgirl [10]3 years ago
5 0
0.009 people because 9/1000 is 0.009<span />
pantera1 [17]3 years ago
3 0
Ya it's 0.009 ;-; ;-;       ;-;                                                   
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True or False: A race car driver tested his car for time from 0 to 60 mph, and in 20 tests obtained an average of 4.85 seconds w
vredina [299]

Answer:

False

Step-by-step explanation:

given that a race car driver tested his car for time from 0 to 60 mph, and in 20 tests obtained an average of 4.85 seconds with a standard deviation of 1.47 seconds.

Sample size n = 20

since population standard deviation is not known, we can use t critical value for finding out the confidence interval

df=19

t critical = 2.045

Margin of error = 2.045*\frac{s}{\sqrt{n} } \\=2.045*\frac{1.47}{\sqrt{20} } \\=0.6722

conidence interval = Mean±Margin of error

= (4.85-0.6722, 4.85+0.6722)\\= (4.1778, 5.5222)

The given confidence interval is (4.52, 5.18)

Hence the statement is false.

5 0
3 years ago
Elizabeth has 87.75 feet of banner paper how many banners can she make that are 11.25 feet long. explain
lana [24]
7.8 or if you are rounding it’s eight
6 0
3 years ago
Select all the numbers that belong to the special sequence of square numbers.
ipn [44]

answer:

81

169

81 =9²

169=13²

7 0
3 years ago
Sergio ate 3.5 cookies. Each cookie contained 5.7 grams of sugar. How many grams of sugar did Sergio eat?
FrozenT [24]
I’ll get it correct here :)

He ate 19.95 grams of sugar.

3.5 x 5.7 = 19.95
5 0
3 years ago
Alex has 520 yards of fencing to enclose a rectangular area.
Pavlova-9 [17]
<span>Perimeter =2w+2L= 520.
We can solve this by understanding that the area is maximized by a square
Therefore L=w.

p=2w+2w=520=4w
w=130

Area
 
A=wL=130(130)= 16900 square yards</span>
6 0
3 years ago
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