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2 years ago

I'll add a photo of the problem!

Mathematics

1 answer:

Lyrx [107]2 years ago

6 0

Answer:

its d

Step-by-step explanation:

the number 30 is not listed in the problem there that is info that is not there

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In the formula A(t) = A0ekt, A(t) is the amount of radioactive material remaining from an initial amount A0 at a given time t an

Alenkasestr [34]

Answer: 693 years

Step-by-step explanation:

Expression for rate law for first order kinetics is given by:

$A(t) =A_0e^{kt}$

k = rate constant

t = time taken for decomposition = 1

$A_0$ = Initial amount of the reactant

$A_t$ = amount of the reactant left = $A_0-\frac{0.1}{100}\times A_0=0.999A_0$

$0.999A_0=A_0e^{k\times 1}$

$0.999=e^k$

$k=-0.001year^{-1}$

for half life : $t=t_\frac{1}{2}$

$A_t=\frac{1}{2}A_o$

Putting in the values , we get

$\frac{1}{2}A_0=A_0e^{-0.001\times t_\frac{1}{2}$

$t_\frac{1}{2}=693 years$

Thus half life of this isotope, to the nearest year is 693.

8 0

3 years ago

May I please have the answers to this problem

sp2606 [1]

Answer:

6x+5

Step-by-step explanation:

2x+4x =6x

10-5=5

6x+5

6 0

3 years ago

-\frac{4\left(x+3\right)}{5}=4x-12

Keith_Richards [23]

Answer:

huh

Step-by-step explanation:

6 0

3 years ago

Am I correct or wrong on my answer

astraxan [27]

Answer:

wrong

Step-by-step explanation:

5 0

2 years ago

Read 2 more answers

Can someone answer it please I really need help please I need it right now I was so frustrating please help and please show work

Eduardwww [97]

Answer:

2 1/4 yards above sea level

Step-by-step explanation:

The midpoint elevation is the average of the endpoint elevations, their sum divided by 2. When elevation is below sea level, it is represented by a negative number.

(17 3/4 - 13 1/4)/2 = (4 2/4)/2 = 2 1/4 . . . yards above sea level

8 0

2 years ago

I'll add a photo of the problem! ​

I'll add a photo of the problem!