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ella [17]
2 years ago
11

There is a new treatment to help smokers stop smoking in an experiment, 80% of 300 smokers quit after 10 days of treatment which

of the following is the 95% confidence interval?
(0.7547, 0.8453)
(8096, 08904)
(08048 08952)
(0.749,0 851)
Mathematics
1 answer:
Thepotemich [5.8K]2 years ago
6 0

Answer:

(0.755, 0.845)

Step-by-step explanation:

I got it right, on the test so trust me!

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The area of a circle is 16π cm2. What is the circle's circumference?
agasfer [191]

Answer:

C = 8 pi cm

Step-by-step explanation:

The area of a circle is given by

A = pi r^2

16 pi = pi r^2

Divide each side by pi

16 = r^2

Taking the square root

4 = r

The circumference is

C = 2 * pi *r

C = 2* pi *(4)

C = 8 pi cm

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A farmer has a truckload of watermelons to take to market. At the beginning of the trip, the watermelons weigh 1000 kg. 99% of t
Mariulka [41]

Answer:

The weight of watermelon at the end of the trip is <u>500 kg.</u>

Step-by-step explanation:

Given:

The weight of watermelons is 1000kg.

At the beginning of the trip watermelon is 99% of the weight:

99% of 1000kg

\frac{99}{100}\times 1000

=0.99\times 1000

= 990 kg

Now, at the end of the trip it is 98% of weight. So, let x kg of water has been evaporated. So, remaining weight of the watermelon is 1000-x.

If x kg of water is removed, then the amount of water left is 990-x.

As per question, water now weighs 98% of the total weight. So,

98% of (1000-x) = 990-x

\frac{98}{100}\times (1000-x)=990-x

980-0.98x=990-x

-0.98x+x=990-980 (Bringing like terms on one side)

0.02x=10\\x=\frac{10}{0.02}=500\ kg

Therefore, the weight of watermelon at the end of the trip is given as:

Weight = 1000 - x = 1000 - 500 = 500 kg

Therefore, the watermelon weighs 500 kg at the end of trip.

7 0
3 years ago
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Which angle is adjacent to ZCGD?<br> B<br> G<br> с<br> D<br> E
jek_recluse [69]
Can you give more details please
7 0
3 years ago
Help! I give brainlest. Problem is in Image
yawa3891 [41]

Answer:

65

Step-by-step explanation:

let's place 9 in place of p and 4 in place of q. I will use a star in place of that symbol for the sake of my convenience having to look for it, apologies.

9 \star 4  = 9^2-4^2 = 81-16 = 65

5 0
2 years ago
Read 2 more answers
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