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3 years ago

Can someone please help me with this

Mathematics

1 answer:

dlinn [17]3 years ago

8 0

surface are is basically the area of all the shapes in the prism, so :

(2 x area of the triangles on the sides) + area of upper rectangle + area of bottom rectangle + area of side rectangle

(2x((1/2) x 12 x 5)) + (13 x 10) + (12 x 10) + (10 x 5)

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A fourth grade class of 28 students is given a standardized math test. The mean score of the 12 boys is 25 with a standard devia

Mashcka [7]

Answer:

The standard error for the sampling distribution is 1.323.

Step-by-step explanation:

Let <em>X</em> = scores of girls and <em>Y</em> = scores of boys.

The information provided is:

$\bar x=24\\s_{x}=4\\n_{x}=16\\\bar y=25\\s_{y}=3\\n_{y}=12$

As the population standard deviations are not known, use a pooled standard deviation to estimate the standard error of the sampling distribution.

The formula of pooled standard deviation is:

$S_{p}=\sqrt{\frac{s_{x}^{2}}{n_{x}^{2}}+\frac{s_{y}^{2}}{n_{y}^{2}}}$

Compute the standard error for the sampling distribution as follows:

$SE=\sqrt{\frac{s_{x}^{2}}{n_{x}^{2}}+\frac{s_{y}^{2}}{n_{y}^{2}}}=\sqrt{\frac{4^{2}}{16}+\frac{3^{2}}{12}}=\sqrt{1+\frac{9}{12}}=\sqrt{\frac{21}{12}}=1.323$

Thus, the standard error for the sampling distribution is 1.323.

7 0

3 years ago

What represents the range of books that Kenneth can purchase?

Zarrin [17]

Answer: B

Step-by-step explanation:

5 0

3 years ago

HELP

vaieri [72.5K]

4/8 simplified is 2/4 i think

3 0

4 years ago

Ayanna jumps rope 32 times every minute. What is the algebraic equation to express the function of the total number of times Aya

kenny6666 [7]

Answer:

B) $j=32m$

Step-by-step explanation:

Given:

Ayanna jumps at the rate of = 32 times/minute

To find the algebraic equation to express the function of the total number of time Ayanna jumped the rope.

Solution:

Let $j$ represent the total jumps made by Ayanna.

Let Ayanna jump for $m$ minutes.

Using unitary method to calculate total number of jumps made by Ayanna in $m$ minutes.

In 1 minute, Ayanna jumps = 32 times

Thus, in $m$ minutes Ayanna will jump = $32\times m=32m$ times

Thus, the function can be represented as;

$j=32m$ (Answer)

8 0

3 years ago

Please help thank you so much hope yall have a great day

kotegsom [21]

Answer:

-0.999, -0.99, -0.9, 0, 2, 4 , 7

Hope this helps!

8 0

3 years ago

Read 2 more answers