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never [62]
3 years ago
11

Solve the triangle. A = 46° a = 33 b = 26

Mathematics
2 answers:
frozen [14]3 years ago
7 0
Using sin rule:
a/sin A =b/sin B=c/sin c
SIN A=sin 46=0.72
THEN:sin B =(0.72*26)/33=0.57
then B= 34° 
AS the sum of triangle angles=180 
then C=180-(46+34)=100°
then c =(a*sin C)/sin A
sin C=sin 100=0.98
=(33*0.98)*0.72=45
PSYCHO15rus [73]3 years ago
5 0

Answer:

B=34.5\degree

C=99.5\degree

c=45.2

Step-by-step explanation:

We use the sine rule to obtain;

\frac{\sin(B)}{b}=\frac{\sin(A)}{a}

We substitute the values to obtain;

\frac{\sin(B)}{26}=\frac{\sin(46\degree)}{33}

We multiply through by 26 to obtain;

\sin(B)=\frac{\sin(46\degree)}{33}\times 26

\sin(B)=0.5668

B=\sin^{-1}(0.5668)

B=34.5\degree

We now use the sum of angles in a triangle to obtain;

C+34.5\degree+46\degree=180\degree

C+80.5\degree=180\degree

C=180\degree-80.5\degree

C=99.5\degree

We use the sine rule again to get;

\frac{c}{\sin(99.5\degree)}=\frac{33}{\sin(46\degree)}

c=\frac{33}{\sin(46\degree)}\times \sin(99.5\degree)

c=45.2

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Approximately 14 percent of the population of Arizona is 65 years or older. A random sample of five persons from this population
Andreas93 [3]

Answer:

A)0.8533

Step-by-step explanation:

For each person, there are only two possible outcomes. Either they are 65 or older, or they are not. The probability of a person being 65 or older is independent of any other person. So we use the binomial probability distribution to solve this question.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

In which C_{n,x} is the number of different combinations of x objects from a set of n elements, given by the following formula.

C_{n,x} = \frac{n!}{x!(n-x)!}

And p is the probability of X happening.

14 percent of the population of Arizona is 65 years or older.

This means that p = 0.14

A random sample of five persons from this population is taken.

This means that n = 5

The probability that less than 2 of the 5 are 65 years or older is :

P(X < 2) = P(X = 0) + P(X = 1)

In which

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

P(X = 0) = C_{5,0}.(0.14)^{0}.(0.86)^{5} = 0.4704

P(X = 1) = C_{5,1}.(0.14)^{1}.(0.86)^{4} = 0.3829

P(X < 2) = P(X = 0) + P(X = 1) = 0.4704 + 0.3829 = 0.8533

So the correct answer is:

A)0.8533

3 0
3 years ago
I need some help with this:)I'll apreciate the answers.
Travka [436]
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7 0
3 years ago
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