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crimeas [40]
3 years ago
14

Select the correct answer.

Mathematics
2 answers:
Maru [420]3 years ago
6 0

Answer:

B

Step-by-step explanation:

hdjdusvsbzbdhxusbeusishwbs

masha68 [24]3 years ago
4 0

Answer:

(A)

Step-by-step explanation:

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Find the volumes of the solids whose bases are bounded by the circle x^2 + y^2 = 9, with the indicated cross sections taken perp
labwork [276]

<em>x</em> ^2 + <em>y</em> ^2 = 9   =>   <em>y</em> = <em>y(x)</em> = ± √(9 - <em>x</em> ^2)

Each cross section would be a square with side length equal to the vertical distance between the upper and lower semicircles defined by <em>y(x)</em>, which is

√(9 - <em>x</em> ^2) - (- √(9 - <em>x</em> ^2)) = 2 √(9 - <em>x</em> ^2)

The area of each square section is the square of this length,

(2 √(9 - <em>x</em> ^2)) = 4 (9 - <em>x</em> ^2) = 36 - 4<em>x</em> ^2

We get the whole solid for -3 ≤ <em>x</em> ≤ 3, so integrating gives a volume of

\displaystyle\int_{-3}^3(36-4x^2)\,\mathrm dx=\boxed{144}

3 0
3 years ago
HURRYYYYY<br> What is the value of the expression 4’4?
WINSTONCH [101]

Answer:

256

Step-by-step explanation:

Raise 4 to the power of 4

Basically, multiply 4 by itself four times. :)

4 0
3 years ago
PLEASE HELP ASAP! WILL GIVE BRAINLIST!
agasfer [191]

Answer:

f(x) = 10x - 2x + 4.

Step-by-step explanation:

This is linear  because the degree of x  is 1.

The others have degree 2 , degree 3 and degree -1.

(f(x) = 2/x = 2x^-1)).

4 0
3 years ago
Please help what is the answer?
anastassius [24]

Answer:

I’m pretty sure it is 148.5

Step-by-step explanation:

Triangle Volume=lwh divided by 2

5 0
3 years ago
Read 2 more answers
Answer each question using ratios.
Gnom [1K]

Answer:

B) 42:28

Step-by-step explanation:

First, let's get 12:18 simplified to make it easier to compare:

12:18 -> 4:6 - > <u>2:3</u>

Now let's check it against all the options:

A) 20:30 -> 2:3 and 2:3 = 2:3

Not our answer as it is congruent (equal too, the same as, etc)

B) We can see that the first number is larger than the second number, so without doing too much math we can see this is our answer!

42:28

(it simplifes to 6:4 -> 3:2)

(we do not have to do the following as we already have an answer, but here is the math)

C) 4:6

4:6 ->

2:3 = 2:3

D) 2:3

2:3 = 2:3

5 0
2 years ago
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