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2 years ago

Im so confused can anyone help

Mathematics

1 answer:

Nadya [2.5K]2 years ago

8 0

Answer:

Step-by-step explanation:

the number of ones expected is

probability × number of rolls

= 0.3 × 150

= 45

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Based on the timeline, which of the following statements is true?

Morgarella [4.7K]

Answer:

<h2><u>Answer B. </u></h2>

Step-by-step explanation:

If you check each answer, only B works since it is the only one that would place everything correctly on the timeline

5 0

3 years ago

Solve the inequality. 2 divided by 5 is greater than or equal to x minus the quantity 4 divided by 5 end of quantity.

In-s [12.5K]

2/5 ≥ x - (4/5). add 4/5 to each side
6/5 ≥ x

7 0

3 years ago

A marketing firm is asked to estimate the percent of existing customers who would purchase a "digital upgrade" to their basic ca

Ugo [173]

Answer: A. 664

Step-by-step explanation:

Given : A marketing firm is asked to estimate the percent of existing customers who would purchase a "digital upgrade" to their basic cable TV service.

But there is no information regarding the population proportion is mentioned.

Formula to find the samples size , if the prior estimate to the population proportion is unknown :

$n=0.25(\dfrac{z*}{E})^2$

, where E = Margin of error.

z* = Two -tailed critical z-value

We know that critical value for 99% confidence interval = $z*=2.576$ [By z-table]

Margin of error = 0.05

Then, the minimum sample size would become :

$n=0.25(\dfrac{2.576}{0.05})^2$

Simplify,

$n=0.25\times2654.3104=663.5776\approx664$

Thus, the required sample size= 664

Hence, the correct answer is A. 664.

5 0

3 years ago

Ari’s teacher says he may have his report grade based on either the mean or the median of his last six test scores.

viva [34]

The mean would be the best! The mean is when you add up all of those grades and divide by the amount of exams.

If you're solving it,

504 is the total divided by 6 tests would be 84.

3 0

3 years ago

Read 2 more answers

Which of the following is equivalent to the expression below?<br> (5+1) + (7 - 41)

Strike441 [17]

Answer:

-28

Step-by-step explanation:

6+(-34)

6-34= -28 that is the simplified form though the question isnt clear

4 0

3 years ago