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lesya692 [45]
3 years ago
13

Find the length of BC

Mathematics
1 answer:
Ivan3 years ago
6 0

Answer:

13.3650978628

Step-by-step explanation:

Angle A=180-(Angle B+C)=180-117=63

Here,

b=BC, p=AC & AB=12

Using the relation of cos,

cosx=b/h

cos27=BC/15

15cos27=BC

Using a calculator,

BC=13.3650978628

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Esearchers followed 803 patients, of whom 398 ended up getting surgery. after two years, of those who had surgery, 63% percent s
denis23 [38]

The required probability that a patient had surgery and experienced a major improvement 31% and that a patient received nonsurgical treatment 14.5%.

<h3>What is probability?</h3>

Probability can be defined as the ratio of favorable outcomes to the total number of events.

Here,
Number of patients who got surgery  = 398,
63% of  percent said they had a major improvement in their condition,
= 0.63 * 398 ≈ 250
29% among those who received nonsurgical treatment,
= 0.29 * (803 - 398)
= 0.29 * 405
≈ 117

Now,
The probability that a patient had surgery and experienced a major improvement in his or her condition.
= 250 / 803
= 31%

The probability that a patient received nonsurgical treatment and experienced an improvement in his or her condition.
= 117 / 803
= 14.5%

Thus, the required probability is 31% and 14.5%.

Learn more about probability here:

brainly.com/question/14290572

#SPJ4


6 0
1 year ago
IN A CLASS OF 30 STUDENTS 13 OF THEM ARE BOYS WHAT PERCENTAGE ARE GIRLS?
mestny [16]
Class of students - number of students that are boys = numbers of students that are girls

30 - 13 = 17

To change the number of students that are girls into percentage...

17/1 * 1/100 = 17/100

17/100 in a % form = 17%

The percentage of girls in the class is 17%

5 0
4 years ago
How would I give 12.50 dollars to 350 people evenly
Nadya [2.5K]

Answer:

12.5/350

Step-by-step explanation:

12.50 amount of money divided by amount of people

12.5/350

roughly .035 per person but half cents don't exist

3 0
3 years ago
In the first four months of the year, Noralie's jewelry sales were declining. After April, her sales began to improve. The funct
Aleksandr-060686 [28]
Is your function y= { -x+8, if x<4 x, if x is greater than or=4? Cause if so then yes, your answer would be true then
4 0
4 years ago
Help solve this problem please?
maw [93]

Answer: z=29 x=119 y=61

Step-by-step explanation:

A ray is 180 degrees and you can go from there. Hope this helps!

8 0
3 years ago
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