3 years ago

Is this the right answer?

Mathematics

2 answers:

vesna_86 [32]3 years ago

6 0

It's not correct.

1 mole = 6.022 * 10^23
12.04*10^23/6.022 * 10^23 = 1.999 moles≈ 2 moles

Viktor [21]3 years ago

5 0

Yes that is correctamundo..............

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The volume of a sphere is 80pi cm3. What its is surface area to the nearest whole number

vlabodo [156]

Volume = (4/3) * PI * radius^3
80 * PI = (4/3) * PI * radius^3
The 'PI's' cancel out leaving
80 = (4/3) * radius^3
radius^3 = 80/(4/3)
radius^3 = 60

radius = cube root (60)

3 0

3 years ago

For the function f defined by f(x) = 3x^2 + 3x + 4, find the following values.

Vsevolod [243]

$\large \mathfrak{Solution : }$

let's solve for f(-9) :

3(-9)² + (3 × -9) + 4

(3 × 81) - 27 + 4

243 - 23

6 0

3 years ago

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Am animal shelter provides a bowl with 1.25 liters of water for 3 cats. About how much water will be left after the cats drink t

Gemiola [76]

If you have notes refer to them then ask again and see if it makes sense to you any more

7 0

3 years ago

1/5 divided 3=1/15 because

Keith_Richards [23]

A number being divided by a number would be the same as a number multiplied by the reciprocal of the other number.

Reciprocal: the “flip” of a fraction (ex. the reciprocal of 6/7 is 7/6)

Example:
5/6 / 1/6
= 5/6*6/1
=30/6
=5

We can apply the same to the question 1/5 / 3.

1/5 / 3
=1/5*1/3
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I hope this helps! Please comment if you have any questions.

3 0

3 years ago

Factor the expression.

grigory [225]

Hey!

First, let's write the problem,
$4r^2-64$
Factor out the common term, which is 4,
$=4\left(r^2-16\right)$
Then, let's factor this part: $r^2-16$
We are going to factor it using the difference of squares rule.
$=\left(r+4\right)\left(r-4\right)$
Our final factored answer would be,
$=4\left(r+4\right)\left(r-4\right)$

Thanks!
-TetraFish

8 0

3 years ago

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