All categories

2 years ago

PLSS HELPPP 20 POINTS

Mathematics

2 answers:

Maurinko [17]2 years ago

7 0

Answer:

Step-by-step explanation:

just did it

mariarad [96]2 years ago

7 0

Answer:the 2nd one is the answer it's easy I just did it :

You might be interested in

Each cone of the hourglass has a height of 15 millimeters. The total height of the sand within the top portion of the hourglass

BARSIC [14]

Calculate the volume of sand, the cone will be completely filled and the cylinder will have sand up to the 30 mm level.

Volume of sand will = the volume of the cone:
= 1/3 * pi * (6 mm)^2 * 15
= 1/3 * pi * 36 * 15 =180 pi cubic mm

the cylinder will have a volume of sand equal to:
= pi * (6 mm)^2 * 30 mm
= pi * 36 sq mm * 30 mm
= 1080 pi cubic mm

The total sand is the sum:
= 1080 pi cubic mm +180 pi cubic mm
= 1260 pi cubic mm. <span>
</span>

5 0

2 years ago

Read 2 more answers

Researchers have a sample size of 24 , and they are using the Student's t-distribution. What are the degrees of freedom and how

DerKrebs [107]

Answer:

For this case assuming that the random variable is X

$df = n-1$

And replacing n = 24 we got:

$df = 24-1=23$

And we notate the distribution we got: $X \sim t_{n-1}= t_{23}$

Step-by-step explanation:

Previous concepts

The t distribution (Student’s t-distribution) is a "probability distribution that is used to estimate population parameters when the sample size is small (n<30) or when the population variance is unknown".

The shape of the t distribution is determined by its degrees of freedom and when the degrees of freedom increase the t distirbution becomes a normal distribution approximately.

The degrees of freedom represent "the number of independent observations in a set of data. For example if we estimate a mean score from a single sample, the number of independent observations would be equal to the sample size minus one."

Solution to the problem

For this case assuming that the random variable is X

$df = n-1$

And replacing n = 24 we got:

$df = 24-1=23$

And we notate the distribution we got: $X \sim t_{n-1}= t_{23}$

7 0

2 years ago

In previous months, you ordered 80 boxes of pens per month. This month, you want to decrease the number of boxes of pens you ord

Lapatulllka [165]

80(0.40)=32
80-32=48 boxes of pens

3 0

2 years ago

Read 2 more answers

Need help <br> -1/2 + (3/4X4/9)=

Agata [3.3K]

Answer:

The correct answer would be negative 1 over 6 also written as -1/6

Step-by-step explanation:

HAVE A GOOD DAY!

4 0

2 years ago

Read 2 more answers

A baseball costs $4.00.If the sales tax is 5%,what is the total prics?

Liula [17]

In order to get the total price, we can multiply the 4 dollars by .05 to find 5 percent of the object's cost and add it to the sales tax. So, .05 times 4 is 0.2, meaning there is a sales tax of 0.2 dollars. We add that to the four, so the total price is 4.20 dollars. Hope this helps.

7 0

2 years ago

Read 2 more answers