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3 years ago

Please answer this i nee this grade

Mathematics

2 answers:

Serhud [2]3 years ago

5 0

Answer:

Step-by-step explanation:

kaheart [24]3 years ago

3 0

Answer:

2/3

Step-by-step explanation:

because the probability of it landing are 1/3 and its asking the probability of it not landing

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3.3 million births per year. How many births per minute?

stellarik [79]

There could be more than 100 births per minute as long as it equals to 3.3 million

3 0

3 years ago

Read 2 more answers

Suppose a large shipment of laser printers contained 18% defectives. If a sample of size 340 is selected, what is the probabilit

Anestetic [448]

Answer:

The probability that the sample proportion will be greater than 13% is 0.99693.

Step-by-step explanation:

We are given that a large shipment of laser printers contained 18% defectives. A sample of size 340 is selected.

Let $\hat p$ = the sample proportion of defectives.

The z-score probability distribution for the sample proportion is given by;

Z = $\frac{\hat p-p}{\sqrt{\frac{\hat p(1-\hat p)}{n}} }$ ~ N(0,1)

where, p = population proportion of defective laser printers = 18%

n = sample size = 340

Now, the probability that the sample proportion will be greater than 13% is given by = P( $\hat p$ > 0.13)

P( $\hat p$ > 0.13) = P( $\frac{\hat p-p}{\sqrt{\frac{\hat p(1-\hat p)}{n}} }$ > $\frac{0.13-0.18}{\sqrt{\frac{0.13(1-0.13)}{340}} }$ ) = P(Z > -2.74) = P(Z < 2.74)

= 0.99693

The above probability is calculated by looking at the value of x = 2.74 in the table which has an area of 0.99693.

5 0

4 years ago

Sarah has a bag of 50 skittles, some are red and some are yellow. Sarah randomly pulls a skittle out of the bag and records it,

Leno4ka [110]

Answer:

Step-by-step explanation:

Assume n is the number of times she pick a skittle out of the bag

The probability she pick out red : 8/n

The probability she pick out yellow : 12/n

=> The ratio of red and yellow skittle : 8/n : 12/n = 8/12 = 2/3, means every 2 red skittles we have 3 yellow ones.

But we have 50 skittles, so the likely numbers of reds in the bag is = 2* $\frac{50}{5}$ = 20

6 0

4 years ago

1. Which equation shows a non-proportional

patriot [66]

Answer:

Option D. $y=2x+2$

Step-by-step explanation:

we know that

A relationship between two variables, x, and y, represent a proportional variation if it can be expressed in the form $k=\frac{y}{x}$ or $y=kx$

In a proportional relationship the constant of proportionality k is equal to the slope m of the line and the line passes through the origin

Verify each case

case A) we have

$y=-2x$

Is a equation of the form $y=kx$

The value of k=-2

This equation represent a proportional relationship

case B) we have

$y=2x$

Is a equation of the form $y=kx$

The value of k=2

This equation represent a proportional relationship

case C) we have

$y=-2x+0$

The line passes through the origin, because the y-intercept is b=0

This equation represent a proportional relationship

case D) we have

$y=2x+2$

The line not passes through the origin, because the y-intercept is not equal to zero (b=2)

This equation not represent a proportional relationship

4 0

4 years ago

A flying cannonball’s height is described by formula y=−16 <img src="https://tex.z-dn.net/?f=%20t%5E%7B2%7D%20" id="TexFormula1"

Morgarella [4.7K]

Y = -t ^ 2 + 300t - 16
We find the first derivative and calculate its roots.
We make the second derivative, and calculate the sign taken in it by the roots of the first derivative, and if:
f '' (a) <0 is a relative maximum
f '' (a)> 0 is a relative minimum

y '= - 2t + 300 = 0
-2t + 300 = 0
t = 300/2 = 150

y'' = - 2
y'' (150) = - 2 (is a relative maximum)

the highest point of the trajectory is reached for t = 150s.
The height for that time is
y = - (150) ^ 2 + 300 (150) - 16 = 67484

answer
67484
t = 150s.

4 0

3 years ago