1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Ne4ueva [31]
3 years ago
10

Which expression represents the approximate length of bc?

Mathematics
2 answers:
bonufazy [111]3 years ago
6 0

Hello from MrBillDoesMath!

Answer:

BC = 3 * sin (66)/ sin(38)

Discussion:

From the law of sines:

sin(38) /3 = sin(66)/ BC

BC *  (  sin(38)/3 )  = sin(66)        => multiply both sides by BC

BC = sin(66) /  ( sin(38)/3)           => multiply both sides by ( 3/sin(38) )

BC = 3 * sin (66)/ sin(38)

which is the first choice.

Regards,  

MrB

P.S.  I'll be on vacation from Friday, Dec 22 to Jan 2, 2019. Have a Great New Year!


sashaice [31]3 years ago
4 0

Answer:

answer is A

Step-by-step explanation:..

You might be interested in
4x = 8x − 1<br><br> x = three fourths<br> x = 1<br> x = 3<br> x = 6
makvit [3.9K]
Isolate the variable by subtracting 8x from both sides to get -4x = -1. multiply both sides by -1 to get 4x = 1. divide both sides by 4 to get x = 1/4.
5 0
3 years ago
Read 2 more answers
3. A team of eye surgeons has developed a new technique for a risky eye operation to restore the
Zigmanuir [339]

Answer:

Yes the new method if sample size was less than 20 than that of old method or identical sample numbers of old and new the differences still prove the new operation is better. As 88 patients minus 1% still shows us 76.7475 significance of  old method being low point 67.5 = 30% of 225 and proved a 65.25 low point and 69.75 high point which is also a 20% jump to new methods low point significance.

You cna show this as workings to prove or follow any of the below statements.

Where new method of 88 patients -0.01 significance rate stands at 76.7475. This figure has reduced by 11.2525 from 88 patients to 76.7 we compare this to the old method if reversing significance we find  = 62.5 and it's 30% standing value of 67.5  as +1% increase shows us 31% = 69.7  ( 0.31 x 225 = 69.74)

Step-by-step explanation:

88/225  = 0.39111111111 = 39.11%%

P value 01 = 1%  =  225.225 or 5% range of alternative hypotheses.

To graph the P value we take the distance between the sample mean and the null hypothesis value (225 + 1% of sample - x nhv) = y ). We can graph the probability of obtaining a sample mean  (225 +/- ( x +1% of sample) where nhv has a decimal if needed to utilize the 1% added). we would replace nvp in this example with  Ha or H1 which means the alternative hypotheses as the data shows less than or equal to.

We can then show 225.225 -  Ha or H1  then graph the probability of obtaining a sample mean that is at least extreme in both tails  Ha or H1

However it would be the other way round where you take the first set of data and use the sample as the 30% significance of that sample indicates it may be a larger sample or a higher significance. Therefore this would be used in the graphing - 1%

We prove that 30-1 =29  where 29% of 225 = 225 x 0.29 = 65.25

this way we have proved that the new set of data being equal to 88 patients regaining their eyesight is <23 and can be written like this 65.25< x <88

This means that sample mean has taken the 1% to show on the graph we can show 225> 33.11 +1 .

We can prove that both indifference of significance would reduce when 1% is added and close based on being a higher percentage to begin with.

34.11 = 0.3411 x 225 = 76.7475 for second surgeon = 33.11% +1

Where as shown

30 = 0.3 x 225 = 67.5

76.5475 - 67.5 = 9.04 difference when comparing old method = +1%

where new method stands at 76.7475 has reduced by 11.2525 from 88 patients and where old method if reversing = 62.5 and has reduced from 67.5  as +1% and 31% = 69.7  ( 0.31 x 225 = 69.74)

You would therefore graph each higher methods first if comparing both by 0.01 or show 88 on graph and 76.7475 = +1%

NB/ if sample size was 20 more in the old data then 225+20 = 245 x 0.29 = 71.05 and would still be lower than new data. = 2.0 increase level of significance and not relevant unless you are looking for the decrease which means new is greater than 20% success than that of old method findings where 30% = 67.5.

5 0
3 years ago
Answer both for brainliest and 20 pts
Nata [24]

Answer:

ed = 3

lm = 30.6

Step-by-step explanation:

5 0
3 years ago
A school principal is trying to collect data about how often students earn detention. To do so, she gives a 7-question survey du
ExtremeBDS [4]

Answer:

B

Step-by-step explanation:

I think B is right because it's only on one day so that one day could have way more kids than usual or way less.

3 0
2 years ago
DeShawn deposited $6500 into a bank account that earned 11.5% simple interest each year. He earned $4485 in interest before clos
daser333 [38]

6 hope this helps! :)


3 0
3 years ago
Other questions:
  • suppose the correlation coefficient between the number of the college students in a city and the number of city buses is 0.89. w
    15·2 answers
  • What is that value is (5)squared
    8·2 answers
  • 50% of 25,000 =<br>fifty percent of twenty five thousand equal
    7·2 answers
  • 22 The equation x2 = 25 has two different
    10·1 answer
  • Y= -(x - 1)(x + 3) has how many real roots?
    15·1 answer
  • What is the surface area of a square with radius 4?
    9·2 answers
  • How do you plot y=3x+2
    8·1 answer
  • PLEASE I ONLY HAVE 5 MINS TO FINISH THIS!!!!!!!!!!!
    9·1 answer
  • Read the part of a letter. Dear Nana, I am so glad you came to our house for dinner on Sunday, and I appreciate your kind birthd
    8·2 answers
  • Need Help which one is it???
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!