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3 years ago

What’s the answer? Idk what it is

Mathematics

2 answers:

Aleks [24]3 years ago

8 0

Answer:

B -9/7

Step-by-step explanation:

We need to find a number between

-3 1/3 < x < -4/5

We want a number smaller than between -3 1/3 and -.8

Looking at the choices

-9/7 = - (7/7 + 2/7) = -(1+2/7) = -1 2/7

That is between -3 1/3 and -4/5

valentina_108 [34]3 years ago

7 0

Answer:

$-3\dfrac{1}{3}=-3.(3)\\-\dfrac{4}{5}=-0.8\\=>\\-3.(3)$

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The base of a solid is the region in the first quadrant bounded above by the line y = 5, below by y = sin−1(x), and to the right

Arturiano [62]

Each cross section is a square with side length equal to the vertical distance between the curves $y=5$ and $y=\sin^{-1}x$ , with $0\le x\le1$ , or $5-\sin^{-1}x$ . Then each section has an area of $(5-\sin^{-1}x)^2$ , so the volume of this solid is

$\displaystyle\int_0^1(5-\sin^{-1}x)^2\,\mathrm dx=\boxed{33-5\pi+\frac{\pi^2}4}$

For computing the integral, consider the substitution

$u=5-\sin^{-1}x\implies x=\sin(5-u)\implies\mathrm dx=-\cos(5-u)\,\mathrm du$

Then the integral becomes

$\displaystyle\int_5^{5-\pi/2}u^2(-\cos(5-u))\,\mathrm du$

$=\displaystyle\int_{5-\pi/2}^5u^2\cos(u-5)\,\mathrm du$

Integrate by parts twice; for the first round, take

$f=u^2\implies\mathrm df=2u\,\mathrm du$

$\mathrm dg=\cos(u-5)\,\mathrm du\implies g=\sin(u-5)$

$\implies\displaystyle u^2\sin(u-5)\bigg|_{5-\pi/2}^5-2\int_{5-\pi/2}^5u\sin(u-5)\,\mathrm du$

For the second round, take

$f=u\implies\mathrm df=\mathrm du$

$\mathrm dg=-\sin(u-5)\,\mathrm du\implies g=\cos(u-5)$

$\implies\displaystyle\bigg(u^2\sin(u-5)+u\cos(u-5)\bigg)\bigg|_{5-\pi/2}^5-\int_{5-\pi/2}^5\cos(u-5)\,\mathrm du$

and the rest is trivial.

8 0

3 years ago

Fast forward to the moment after the two outermost recursive calls complete, but before the final Merge step. Thinking of the tw

adoni [48]

Answer:

The answer is 2.

Step-by-step explanation:

1- Suppose we have following array of ten integers: 5 3 8 9 1 7 0 2 6 4.

2- Before the last merge, the left half and the right half must be sorted. So it should be

1 3 5 8 9 0 2 4 6 7

Therefore the solution is 2.

4 0

3 years ago

Ok here is a better pic I need help with it

BartSMP [9]

Answer:

Step-by-step explanation:

First,You have to realize that if you multiply the amount of food by something, you multiply the amount of calories. if some piece of food is 100 calories what happens if you eat 2? you get 2 times that number of calories. Same fi you eat half of one of that kind of food. You get half the amount of calories.

Here he makes 1 1/2 (one and a half) times the amount. Now, if this is confusing you just need to realize that multiplying by this is the same as multiplying by 1+1/2. Say, again, a piece of food is 100 calories. Multiplying it by this would look like the following.

100(1+1/2)

100*1 + 100*1/2

100+50

150

So if you ever have a mixed number like this you could split it up into an addition problem and then distribute hat you're multiplying. Another solution is to multiply by the improper fraction, which here is 3/2, so 100*3/2=150 as well. Let me know if you don't get how to get the improper fraction or how to multiply fractions.

Now, super simple, just multiply the calories by that number.

310(1+1/2) = 310(3/2)

310 + 155 = 930/2

465 = 465

Kinda showed how to multiply by fractions, still if you don't get it let me know.

6 0

3 years ago

What is the volume of the pyramid?

geniusboy [140]

Answer: 16 cm^2.

Step-by-step explanation: The volume of a pyramid is equal to one-third the product of the area of the base and the height:

$V=\frac{1}{3}A*h$

In this case, the base is a square, so its area is:

A=L^2 where "L" is the lenght of the base edge

So the volume would be:

$V=\frac{1}{3}L^{2} *h$

$V=\frac{1}{3}4^{2} *3$

V=16*3/3

$V=16cm^{2}$

7 0

3 years ago

Can you help me please help me

pashok25 [27]

Answer:

I can`t really see the question that well, but if I understand correctly here`s the first few.

1. Subtraction

2. Addition

3. Addition

4. Subtraction

5. Addition

6. Subtraction

It looks like its asking what is happening in those situations (is the number being added or subtracted). Sorry if that`s not much help

4 0

3 years ago