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Bess [88]
3 years ago
10

PLEASE HELP ME GIVING BRAINLIEST

Mathematics
1 answer:
Scorpion4ik [409]3 years ago
8 0

Answer:

B

Step-by-step explanation:

Because it starts from the smallest negative prefix to largest

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Solve the triangle<br> a <br> b <br> c<br> d
Mekhanik [1.2K]

Answer:

B

Step-by-step explanation:

Use the Law of Cosines to find the measure of segment c:

c=\sqrt{a^2+b^2-2ab*cos(C)}\\\\c=\sqrt{12^2+13^2-2(12)(13)*cos(134)}\\\\c=\sqrt{313-312cos(134)}\\\\c=\sqrt{313-312(-.6946583705)}\\\\c=\sqrt{313-(-216.7334116)}\\\\c=\sqrt{313+216.7334116}\\\\c=\sqrt{529.7334116}\\

c ≈ 23.01593821 km ≈ 23 km

Since c = 23 km, our only options are choices B and D. Now, let's find the measure of angle A to confirm. To do this we will use the Law of Sines:

\frac{sin(A)}{a} =\frac{sin(C)}{c} \\\\\frac{sin(A)}{12}=\frac{sin(134)}{23.01593821}\\\\sin(A)=12(\frac{sin(134)}{23.01593821})\\\\A=sin^{-1}[12(\frac{sin(134)}{23.01593821})]\\\\

A ≈ 22.02726885° ≈ 22°

Since the measure of c = 23 km and the measure of angle A = 22°, the answer must be choice B.

7 0
3 years ago
a certain hurricane travels at 20.88 kilometers per hour. the distance from Cuba to key west is 145 kilometers.write and solve a
Reptile [31]
s=\frac{d}{t}\ \ \ \ -->\ \ \ t=\frac{d}{s}\\\\t=\frac{20.88}{145}=0.144h=8.64\ minutes\\\\It\ takes\ 8.64\ minutes.
5 0
3 years ago
What best determines whether a borrower's interest rate on an adjustable rate loan goes up or down?
antiseptic1488 [7]

Answer:

-a market's condition is the correct answer

Step-by-step explanation:

edge 2021 :)

7 0
3 years ago
Read 2 more answers
An inspector inspects large truckloads of potatoes to determine the proportion p in the shipment with major defects, prior to us
Sindrei [870]

Answer:

0.06 - 1.96\sqrt{\frac{0.06(1-0.06)}{200}}=0.027

0.06 + 1.96\sqrt{\frac{0.06(1-0.06)}{200}}=0.093

The 95% confidence interval would be given by (0.027;0.093)

A. 0.027 to 0.093.

Step-by-step explanation:

Notation and definitions

X=12 number of defective.

n=200 random sample taken

\hat p=\frac{12}{200}=0.06 estimated proportion of defectives

p true population proportion of defectives

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".  

The margin of error is the range of values below and above the sample statistic in a confidence interval.  

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".  

The population proportion have the following distribution

p \sim N(p,\sqrt{\frac{p(1-p)}{n}})

Solution to the problem

In order to find the critical value we need to take in count that we are finding the interval for a proportion, so on this case we need to use the z distribution. Since our interval is at 95% of confidence, our significance level would be given by \alpha=1-0.95=0.05 and \alpha/2 =0.025. And the critical value would be given by:

z_{\alpha/2}=-1.96, z_{1-\alpha/2}=1.96

The confidence interval for the mean is given by the following formula:  

\hat p \pm z_{\alpha/2}\sqrt{\frac{\hat p (1-\hat p)}{n}}

If we replace the values obtained we got:

0.06 - 1.96\sqrt{\frac{0.06(1-0.06)}{200}}=0.027

0.06 + 1.96\sqrt{\frac{0.06(1-0.06)}{200}}=0.093

The 95% confidence interval would be given by (0.027;0.093)

A. 0.027 to 0.093.

6 0
4 years ago
A cookie jar contains 2 chocolate chip cookies, 5 oatmeal raisin cookies, and 3 sugar cookies. event a = drawing a chocolate chi
sertanlavr [38]
2 + 5 + 3 = 10 total cookies

event A picking a chocolate chip cookie = 2/10 reduced to 1/5 probability

event B picking a sugar cookie after 1 cookie was already picked = 3/9 reduced to 1/3

probability of both: 1/5 x 1/3 = 1/15 probability
5 0
3 years ago
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