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3 years ago

Plz help me with this will give 25 points, please

Mathematics

2 answers:

goblinko [34]3 years ago

7 0

Answer:

all girls are the same bro

Step-by-step explanation:

mamaluj [8]3 years ago

6 0

Answer:

Step-by-step explanation:

An easy way is to just count the grids blocks, which are squares.

There are 18 of these.

For the rest, since they are in the shape of a triangle, they will count as a half grid block.

There are 4 of these, which are 4 halfs, which equal to 2 square blocks.

Add them, 18+2=20

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You are miguel Cervantes de Navas y colon, captain in the royal spanish army in Sevilla in the year 1842. Outside your barracks

Marina86 [1]

Answer:

A. 650

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

Evaluate<br> 5-(2w-8)=6w-9

Brilliant_brown [7]

Step-by-step explanation:

Steps

5−(2w−8)=6w−9

Show Steps

Expand 5−(2w−8): −2w+13

−2w+13=6w−9

Subtract 13 from both sides

−2w+13−13=6w−9−13

Simplify

−2w=6w−22

Subtract 6w from both sides

−2w−6w=6w−22−6w

Simplify

−8w=−22

Divide both sides by −8

−8w

−8 =

−22

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Simplify

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5 0

3 years ago

Waiting on the platform, a commuter hears an announcement that the train is running five minutes late. He assumes the arrival ti

natima [27]

Answer:

D. 91%

Step-by-step explanation:

Conditional Probability

We use the conditional probability formula to solve this question. It is

$P(B|A) = \frac{P(A \cap B)}{P(A)}$

In which

P(B|A) is the probability of event B happening, given that A happened.

$P(A \cap B)$ is the probability of both A and B happening.

P(A) is the probability of A happening.

In this question:

Event A: Less than 15 minutes.

Event B: Less than 10 minutes.

We are given the following probability distribution:

$f(T = t) = \frac{3}{5}(\frac{5}{t})^4, t \geq 5$

Simplifying:

$f(T = t) = \frac{3*5^4}{5t^4} = \frac{375}{t^4}$

Probability of arriving in less than 15 minutes:

Integral of the distribution from 5 to 15. So

$P(A) = \int_{5}^{15} = \frac{375}{t^4}$

Integral of $\frac{1}{t^4} = t^{-4}$ is $\frac{t^{-3}}{-3} = -\frac{1}{3t^3}$

Then

$\int \frac{375}{t^4} dt = -\frac{125}{t^3}$

Applying the limits, by the Fundamental Theorem of Calculus:

At $t = 15$ , $f(15) = -\frac{125}{15^3} = -\frac{1}{27}$

At $t = 5$ , $f(5) = -\frac{125}{5^3} = -1$

Then

$P(A) = -\frac{1}{27} + 1 = -\frac{1}{27} + \frac{27}{27} = \frac{26}{27}$

Probability of arriving in less than 15 minutes and less than 10 minutes.

The intersection of these events is less than 10 minutes, so:

$P(B) = \int_{5}^{10} = \frac{375}{t^4}$

We already have the integral, so just apply the limits:

At $t = 10$ , $f(10) = -\frac{125}{10^3} = -\frac{1}{8}$

At $t = 5$ , $f(5) = -\frac{125}{5^3} = -1$

Then

$P(A \cap B) = -\frac{1}{8} + 1 = -\frac{1}{8} + \frac{8}{8} = \frac{7}{8}$

If given the train arrived in less than 15 minutes, what is the probability it arrived in less than 10 minutes?

$P(B|A) = \frac{P(A \cap B)}{P(A)} = \frac{\frac{7}{8}}{\frac{26}{27}} = 0.9087$

Thus 90.87%, approximately 91%, and the correct answer is given by option D.

3 0

3 years ago

FUTURE SMART QUESTION +25 POINTS PKEASE ANSWER

Rufina [12.5K]

Answer:

18750

Step-by-step explanation:

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3 years ago

Write the equation of the trigonometric graph.

Angelina_Jolie [31]

Answer:

started off from maximum, so f(x) = acos(bx)

max(f(x))=a=4

f(x)=4cos(bx)

the period is T = 2π

b=2π/T=2π/2π

b=1

f(x)=4cos(x)

6 0

2 years ago