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Blizzard [7]
2 years ago
11

What is trigonometry ​

Mathematics
2 answers:
Sveta_85 [38]2 years ago
8 0

Answer:

the branch of mathematics concerned with specific functions of angles and their application to calculations.

Step-by-step explanation:

Vlada [557]2 years ago
3 0

Answer:

the branch of mathematics dealing with the relations of the sides and angles of triangles and with the relevant functions of any angles.

Step-by-step explanation:

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Write an equation that models the sequence 400, 200, 100, 50, ...
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You're starting at 400. Each time you're cutting in half. 

So the common ratio is 1/2 which means the equation is

\Large y = 400(1/2)^{x-1}

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Educators are testing a new program designed to help children improve their reading skills. The null hypothesis of the test is t
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3 years ago
Twelve percent of U.S. residents are in their forties. Consider a group of nine U.S. residents selected at random. Find the prob
miskamm [114]

Answer:

The probability is 28 % ( approx )

Step-by-step explanation:

Since, there are only two possible outcomes in every trails ( residents are in their forties or not ),

So, this is a binomial distribution,

Binomial distribution formula,

Probability of success in x trials,

P(x)=^nC_x p^x q^{n-x}

Where, ^nC_x=\frac{n!}{x!(n-x)!}

p and q are probability of success and failure respectively and n is the total number of trials.

Let X be the event of resident who are in his or her forties.

Here, p = 12% = 0.12,

⇒ q = 1 - p = 1 - 0.12 = 0.88,

n = 9,

Hence, the probability that two or three of the people in the group are in their forties = P(X=2) + P(X=3)

^9C_2 (0.12)^2 (0.88)^{9-2}+^9C_3 (0.12)^3 (0.88)^{9-3}

=36(0.12)^2 (0.88)^7+84(0.12)^3 (0.88)^6

=0.279266611163

\approx 0.28

=28\%

7 0
3 years ago
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