2 years ago

Please help me answer this

Mathematics

1 answer:

tekilochka [14]2 years ago

7 0

Answer:

The answer is B

Step-by-step explanation:

Btw if its wrong im sorry

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The half-life of a radioactive material is about 2 years. How much of a 5.0 kg sample of this material will remain after 4 years

HACTEHA [7]

The remaining amount after 4 years is 1.25 kg

<h3>How to determine the remaining amount?</h3>

The half life of a function is represented as:

$A = A_o * (1/2)^{t/h}$

Where

Ao represents the initial amount

So, we have:

$A = 5 * (1/2)^{t/2}$

In 4 years, t = 4.

So, we have:

$A = 5 * (1/2)^{4/2}$

This gives

$A = 5 * (1/2)^2$

Evaluate the expression

A = 1.25

Hence, the remaining amount after 4 years is 1.25 kg

Read more about half life at:brainly.com/question/26148784

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2 years ago

21π<br> Rational<br> Irrational

lesantik [10]

Answer: Rational

Step-by-step explanation:

21 $\pi$ is rational because it is $\pi$ times 21 which is 65.9734457254 and numbers that terminate or repeat are rational.

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3 years ago

(4*10^4)+(6*10^2) Standard form

Crazy boy [7]

Answer:

40600

Step-by-step explanation:

(4 * 10^4) + (6 * 10^2) =

= 4 * 10000 + 6 * 100

= 40000 + 600

= 40600

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3 years ago

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<img src="https://tex.z-dn.net/?f=%20%5Cfrac%7B9%7D%7B32%7D%20.%20%5Cfrac%7B5%7D%7B6%7D%20.%20%5Cfrac%7B8%7D%7B15%7D%20" id="Tex

fomenos

$( \frac{9}{32} \times \frac{5}{6} )\times \frac{8}{15} \\$
Let's do the bracket part first,
and solve further as shown,
$( \frac{3}{32} \times \frac{5}{2}) \times \frac{8}{15} \\ = \frac{15}{64} \times \frac{8}{15} \\ = \frac{8}{64} \\ = \frac{1}{8}$

4 0

3 years ago

Makovka662 [10]

Answer:

B. 198

Step-by-step explanation:

7 0

3 years ago

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