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Vladimir [108]
3 years ago
13

I'm giving 100 POINTS and I MARK BRAINLIESTTT pls answer ASAP tyy ❤️

Mathematics
2 answers:
serious [3.7K]3 years ago
5 0
63.5 is the answer!!!
Ede4ka [16]3 years ago
4 0

Answer:

63.25

Step-by-step explanation:

Area of the triangle:

  1. B × H = A
  2. 8 × 6 = 48
  3. 48 ÷ 2 = 24

Area of the semicircle:

  1. πr^{2} = A
  2. r^{2} = 5^{2} = 25  
  3. π × 25 = 3.14 × 25 = 78.5
  4. 78.5 ÷ 2 = 39.25

Combine them:

  1. 24 + 39.25 = 63.25

I hope this helps!

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A clinical trial tests a method designed to increase the probability of conceiving a girl. In the study 335335 babies were​ born
strojnjashka [21]

Answer:

The 99​% confidence interval estimate of the percentage of girls born is (74.37%, 85.63%).

Usually, 50% of the babies are girls. This confidence interval gives values considerably higher than that, so the method to increase the probability of conceiving a girl appears to be very effective.

Step-by-step explanation:

Confidence Interval for the proportion:

In a sample with a number n of people surveyed with a probability of a success of \pi, and a confidence level of 1-\alpha, we have the following confidence interval of proportions.

\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}

In which

z is the zscore that has a pvalue of 1 - \frac{\alpha}{2}.

For this problem, we have that:

n = 335, \pi = \frac{268}{335} = 0.8

99% confidence level

So \alpha = 0.01, z is the value of Z that has a pvalue of 1 - \frac{0.01}{2} = 0.995, so Z = 2.575.

The lower limit of this interval is:

\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.8 - 2.575\sqrt{\frac{0.8*0.2}{335}} = 0.7437

The upper limit of this interval is:

\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.8 + 2.575\sqrt{\frac{0.8*0.2}{335}} = 0.8563

For the percentage:

Multiplying the proportions by 100.

The 99​% confidence interval estimate of the percentage of girls born is (74.37%, 85.63%).

Usually, 50% of the babies are girls. This confidence interval gives values considerably higher than that, so the method to increase the probability of conceiving a girl appears to be very effective.

7 0
3 years ago
June mad 10 origami birds in 30 minutes Dylan made 4 origami birds in 10 minutes who was faster
Hitman42 [59]

Answer:

Dylan

Step-by-step explanation:

Rate of Origami Making

1) June

= 10/30

= 1/3 origami birds per minute

2) Dylan

= 4/10

= 2/5 origami birds per minute

2/5 > 1/3

So Dylan was faster.

8 0
2 years ago
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REY [17]
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</span><span>−2</span><span> and </span><span>10
</span>
Rewrite the expression using the above:

Answer:
(a−2)(a+10)<span>
</span>
6 0
3 years ago
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Ludmilka [50]
X = -1 
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6 0
4 years ago
This graph displays a linear function. Interpret the constant rate of change of the relationship.
IgorC [24]

Answer: -3/-1  or 3/1 is the rate of change

Step-by-step explanation:

(0,2)

(3,3)    0-3==-3  

          2-3= -1  

-3/-1

4 0
4 years ago
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