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2 years ago

If 3/8 of my money is $3840.00. How much did I have at first? *

Mathematics

2 answers:

NNADVOKAT [17]2 years ago

7 0

Answer:

E $10240.00

Step-by-step explanation:

The total amount of money is x.

3/8 × x = 3840

Multiply both sides by the reciprocal of 3/8 which is 8/3.

x = 3840 × 8/3

x = 10240

Answer: E $10240.00

Llana [10]2 years ago

7 0

Answer:

E. $10240.00

Step-by-step explanation:

$3840.00 is 3/8

so 3 ---> $3840

1 ---> $3840/3

1 ---> 1280

Then total money you had is ( 1280 * 8 ) = $10240

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Use the four-step definition of the derivative to find f'(x) if f(x) = −4x^3 −1.

guapka [62]

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2 years ago

Plz do this question if you did I will very appreciated you. plz.

Nastasia [14]

The area formula of a circle is $r^{2}$ × π.

With that being said, we can solve both problems!

Starting with part A:

-The radius we know is 21cm. From there, we can substitute in our formula with the new value.

$21^{2}$ x π

From there, we can square our radius:

(21 x 21) x π

(441) x π

And finally, we can multiply by pi to get our answer.

(441) x π

1385.44236023

Which rounded to the nearest tenth is 1385.4. Therefore, the area of the porthole is 1385.4 centimetres.

The second part can be followed with the same process, hopefully you understand the concept enough to where you're comfortable solving problems like this on your own. Feel free to reach out if you have any further trouble!

<em>Hope this helped! :)</em>

5 0

3 years ago

one-third of the people from country A claim that they are from country B, and the rest admit they are from country A. One-fourt

In-s [12.5K]

Answer: 3 : 2

Step-by-step explanation:

Let A represents the total population of country A and B represents the total population of country B.

According to the question,

$\text{The population of country A that admit they are from B} = \frac{1}{3}\text{ of }A$