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3 years ago

Since my last question got reported ill give branliest + 20 points for like 2 mins of your time

Mathematics

1 answer:

anyanavicka [17]3 years ago

3 0

Answer:

the diameter of the semi-circle is 5 in

the area of the shape is 79.63 in squared

Step-by-step explanation:

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1. A simulator that randomly generates a line of 20 plus signs or o’s was run 10 times to analyze data on members who pay for a

Over [174]

A simulator that randomly generates a line of 20 plus signs or o’s was run 10 times to analyze data on members who pay for a trainer at a fitness gym. A plus sign represents a member who pay for a personal trainer.

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3 years ago

A catalog company that receives the majority of its orders by telephone conducted a study to determine how long customers were w

Nookie1986 [14]

Answer:

0.917915

Step-by-step explanation:

Exponential distribution is expressed as it follows

F (y,λ) = 1 – e ^(- λ(y) )

Where λ is equal to 1/ population mean

So λ = 1/2.8 = 0.357

Let y be the length of time a costumer wait on hold

Now, let´s find the value for y = 7 minutes, which is the proportion of costumer that wait on hold

P (y<7) = 1 – e^(- .357*(7) )

P (y<7) = 0.917915

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3 years ago

Annabelle the ant and Archibald the ant are on a large coordinate grid. Annabelle is at (3,4) and Archibald is at (33,44). If bo

kvasek [131]

Part a) If both ants skate directly towards each other, starting at the same time and skating the same speed, what will be the coordinates of their meeting place?

Let

A(3,4) B(33.44)

we know that

If both ants skate directly towards each other, starting at the same time and skating the same speed

then

the coordinates of their meeting place is the midpoint AB

Find the midpoint AB

in the x-coordinate

(3+33)/2=18

in the y-coordinate

(4+44)/2=24

the midpoint AB is (18,24)

therefore

the answer Part a) is

the coordinates of their meeting place is (18,24)

Part b) How far will each ant skate?

Find the distance AB

$d=\sqrt{(x2-x1)^{2}+(y2-y1)^{2}}$

substitute the values

$dAB=\sqrt{(33-3)^{2}+(44-4)^{2}}$

$dAB=\sqrt{2,500}$ units

$dAB=50$ units

Find the half distance AB

50/2=25 units

therefore

the answer part b) is

Each ant will skate 25 units

7 0

3 years ago

What is the absolute value of -6? Use the number line to help answer the question.

Nataly_w [17]

Answer:

it is 6

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers

Bottles of purified water are assumed to contain 250 milliliters of water. There is some variation from bottle to bottle because

marshall27 [118]

Answer:

We accept H₀ we don´t have evidence of differences between the information from the sample and the population mean

Step-by-step explanation:

From data and excel (or any statistics calculator) we get:

X = 249,6 ml and s 1,26 ml

Sample mean and sample standard deviation respectively.

Population mean μ₀ = 250 ml

We have a normal distribution but we dont know the standard deviation of the population. Furthermore we have a two tails test since we are finding if the sample give us evidence of differences ( in both senses ) when we compare them with the amount of water spec ( 250 ml )

Our test hypothesis are: null hypothesis H₀ X = μ₀

Alternative Hypothesis Hₐ X ≠ μ₀

We also know that sample size is 8 therefore df = 8 - 1 df = 7 , with this value and the fact that we are required to test at α = 0,05 ( two tails test)

t = 2,365

Then we evaluate our interval:

X ± t* (s/√n) ⇒ 249,6 ± 2,365 * ( 1,26/√8 )

249,6 ± 2,365 * (1,26/2,83) ⇒ 249,6 ± 2,365 *0,45

249,6 ± 1,052

P [ 250,652 ; 248,548]

Then the population mean 250 is inside the interval, therefore we must accept that the bottles have being fill withing the spec. We accept H₀

7 0

3 years ago