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2 years ago

8

fred has a bad containing 2 red, 8 blue, 5 green, and 10 white marbles that are all the same size and shape. what is the probabi

lity of randomly choosing a white marble on the first pick?

2 answers:

Pepsi [2]2 years ago

5 0

Answer:

50%

Step-by-step explanation:

There are a total of 20 marbles.

10/20 equal 50%

PilotLPTM [1.2K]2 years ago

4 0

Answer:

50%

Step-by-step explanation:

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Given center C and a point P on a circle, find its equation?

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3 years ago

Write a vector equation of the line that passes through P(4, 7) and is parallel to a = (3, 8).

Anvisha [2.4K]

Answer:

B

Step-by-step explanation:

(x,y) = P + (a)t

(x,y) = (4,7) + t(3,8)

(x,y) - (4,7) = t(3,8)

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3 years ago

A past survey of students taking a standardized test revealed that % of the students were planning on studying engineering in c

Angelina_Jolie [31]

Complete Question

The complete question is shown on the first uploaded image

Answer:

The 95% confidence interval is $-0.00870$

Step-by-step explanation:

From the question we are told that

The first sample size is $n_1 = 1068000$

The first proportion $\r p_1 = 0.084$

The second sample size is $n_2 = 1476000$

The second proportion is $\r p_2 = 0.092$

Given that the confidence level is 95% then the level of significance is mathematically represented as

$\alpha = (100 - 95)\%$

$\alpha = 0.05$

From the normal distribution table we obtain the critical value of $\frac{ \alpha }{2}$ the value is

$Z_{\frac{\alpha }{2} } =z_c= 1.96$

Now using the formula from the question to construct the 95% confidence interval we have

$(\r p_1 - \r p_2 )- z_c \sqrt{ \frac{\r p_1 \r q_1 }{n_1} + \frac{\r p_2 \r q_2 }{n_2} }$

Here $\r q_1 = 1 - \r p_1$

=> $\r q_1 = 1 - 0.084$

=> $\r q = 0.916$

and

$\r q_2 = 1 - \r p_2$

=> $\r q_2 = 1 - 0.092$

=> $\r q_2 = 0.908$

So

$(0.084 - 0.092 )- (1.96)* \sqrt{ \frac{0.092* 0.916 }{1068000} + \frac{0.084* 0.908 }{1476000} }$

$-0.00870$

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2 years ago

What is the reading in kwh of the electric meter shown in the exam figure below?

Naya [18.7K]

<span>I think the answer is C but I would like someone to double check it for me please.</span>

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3 years ago

Read 2 more answers

Someone please help! I’ll give brainliest!!

Lana71 [14]

Answer:

(1436.8cm³) let me know if that helps

Step-by-step explanation:

-so if the diameter is a straight line and it's 15 cm

-The formula for the sphere it would be v=4/3πr³

-The radius is going to be r=7cm

-v = 4/3 π (7cm)³

-so you would type in 4/3 x 3.14 x 7 ³ =1,436

- 3.14 or π

- you would round it to the nearest 10th (1436.8cm³)

3 0

2 years ago