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kaheart [24]
3 years ago
9

I don’t understand none of this math

Mathematics
2 answers:
Elena-2011 [213]3 years ago
7 0

Answer:

Step-by-step explanation:

\frac{a^3-b^3}{5} =\frac{2^3-(-3)^3}{5} =\frac{8-(-27)}{5} =\frac{8+27}{5} =\frac{35}{5} =7

Ivan3 years ago
4 0

Answer:

6

Step-by-step explanation:

(a^3 - b^3)/5

Let a =2 and b = -3

(2^3 -  (-3)^3)/5

Exponents inside the parentheses

(8 - -27)/5

Subtracting a negative is like adding

(8+27)/5

Finish adding inside the parentheses

35/5

Divide

7

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lbvjy [14]
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4 0
3 years ago
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marta [7]

Answer:

Approximately 3 grams left.

Step-by-step explanation:

We will utilize the standard form of an exponential function, given by:

f(t)=a(r)^t

In the case of half-life, our rate <em>r</em> will be 1/2. This is because 1/2 or 50% will be left after <em>t </em>half-lives.

Our initial amount <em>a </em>is 185 grams.

So, by substitution, we have:

\displaystyle f(t)=185\big(\frac{1}{2}\big)^t

Where <em>f(t)</em> denotes the amount of grams left after <em>t</em> half-lives.

We want to find the amount left after 6 half-lives. Therefore, <em>t </em>= 6. Then using our function, we acquire:

\displaystyle f(6)=185\big(\frac{1}{2}\big)^6

Evaluate:

\displaystyle f(6)=185\big(\frac{1}{64}\big)\approx2.89\approx 3

So, after six half-lives, there will be approximately 3 grams left.

3 0
2 years ago
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aivan3 [116]
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