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4 years ago

10

Plz help me on this I just learned it today!!

2 answers:

anyanavicka [17]4 years ago

6 0

I'll help with one. You have to split the shapes into shapes you know how to find the volume of. Split the first one into two rectangles. The sides of the one on top are 3cm, 4cm, and 10-3cm, since you split it. So 10-3=7. 7*4*3 is 84. Next you find the volume of the lower rectangle. 16cm, 3cm, and 16-3cm are the sides. 16--3 is 13, so 13*4*3 = 156. add both volumes, 86+154 = 240 cm^3 is your answer.

Marysya12 [62]4 years ago

5 0

I can give you the formula to finding volume it would be lxhxw also called length x width x height hope this formula helps

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Today, there were 2 members absent from the band. The present members folded 25 programs each, for a total of 525 programs.

timurjin [86]

Answer: C:How many members are in the band when no one is absent.

Step-by-step explanation:

this is the answer for khan academy .i just got the answer wrong and looked at which one was right

7 0

3 years ago

Read 2 more answers

There are 7 acts in a talent show.

lara31 [8.8K]

Answer:

<u><em></em></u>

<u><em>Event A: 1/35</em></u>

<u><em>Event B: 1/840</em></u>

<u><em></em></u>

Explanation:

<u>Event A</u>

For the event A, the order of the first 4 acts does not matter.

The number of different four acts taken from a set of seven acts, when the order does not matter, is calculated using the concept of combinations.

Thus, the number of ways that the first <em>four acts</em> can be scheduled is:

$C(m,n)=\dfrac{m!}{n!(m-n)!}$

$C(7,4)=\dfrac{7!}{4!(7-4)!}=\dfrac{7!}{4!(3)!}=35$

And<em> the number of ways that four acts is the singer, the juggler, the guitarist, and the violinist, in any order</em>, is 1: C(4,4).

Therefore the<em> probability of Event A</em> is:

$P(A)=1/35$

Event B

Now the order matters. The difference between combinations and permutations is ordering. When the order matters you need to use permutations.

The number of ways in which <em>four acts </em>can be scheculed when the order matters is:

$P(m,n)=\dfrac{m!}{(m-n)!}$

$P(m,n)=\dfrac{7!}{(7-4)!}=P(m,n)=\dfrac{7!}{4!}=840$

The number of ways <em>the comedian is first, the guitarist is second, the dancer is third, and the juggler is fourth</em> is 1: P(4,4)

Therefore, <em>the probability of Event B</em> is:

$P(B)=1/840$

7 0

4 years ago

The number of calculators and backpacks that were turned into the school lost and found have been recorded for 10 days in the sc

34kurt

You need to show the scatter plot

8 0

2 years ago

Solve for x (answer must be written in ___ < x < ____ form)

lbvjy [14]

Answer:

-8<k<-2

Step-by-step explanation:

-50<7k+6<-8

-56<7k<-14

-8<k<-2

5 0

3 years ago

The measure of an exterior angle of a regular polygon is given below. Find the measure of an interior angle. Then find the numbe

FromTheMoon [43]

Answer:

Internal angle = $160^\circ$

Number of sides = 18

Step-by-step explanation:

Given that:

We have a regular polygon with number of sides unknown.

Measure of an exterior angle of the polygon = $20^\circ$

To find:

Measure of an interior angle and the number of sides of the polygon?

Solution:

Let us have a look at the relation of sum of external angles.

Sum of one internal angle and its corresponding external angle = $180^\circ$

Internal angle + external angle = $180^\circ$

Internal angle = $180^\circ$ - $20^\circ$ = $160^\circ$

Sum of all the external of a regular polygon = $360^\circ$

All the external angles will be equal because it is a regular polygon.

Let the number of sides = $n$

Therefore,

$n \times 20^\circ = 360^\circ\\\Rightarrow n = 18$

Therefore, the answers are:

Internal angle = $160^\circ$

Number of sides = 18

8 0

3 years ago