Will mark brainliest, need help ASAP!

Mathematics

1 answer:

nikitadnepr [17]2 years ago

5 0

The percentage of the original sample that is left after 115 days is; 23.4733%

<h3>How to calculate the decay percentage?</h3>

Formula for radioactive decay is;

A = A₀ * (1/2)^(t/t_¹/₂)

where;

A = quantity of the substance remaining

A₀ = initial quantity of the substance

t = time elapsed

t_¹/₂ = half life of the substance

Thus;

A/A₀ = (1/2)^(115/55)

A/A₀ = 0.234733 or 23.4733%

Read more about decay constant at; brainly.com/question/11117468

#SPJ1

You might be interested in

1. Emily filled an empty horse trough with water. The water level, in centimeters, is proportional to time elapsed, in minutes,

Pie

Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions.
depth of water is proportional to time
d = k*t
d = 7/2 * t 
a) the point (2,28) represents the rate 28/8 
b) 3.5 cm/sec
c) the slope between (8, 28) and (6, 21) is 7/2 = 3.5

3 0

3 years ago

Jaden sells a painting for 10 times the original price he sells a painting for $45.50 what was the original price of this painti

Ymorist [56]

$x-\ original\ price\\\\
10x=45,50\ \ \ \ | divide\ by\ 10\\\\
x=4,550\$\\\\
Original\ price\ is\ 4,550\$.$

6 0

3 years ago

Read 2 more answers

How can I calculate if a given decimal is rational or irrational. please help I forgot.

dalvyx [7]

Well, a rational decimal is like a simple 3.1 or 4.5. It just cuts off easily. Another example would be a repeating decimal like 3.333333...

An irrational decimal is like 3.1415682983523576294875 with no pattern or cutoff point.

Sorry if I am wrong.

4 0

3 years ago

Find c, the hypotenuse, rounded to four decimal places, in a right triangle with b = 16 and B = 55

Fudgin [204]

Answer:

c=19.5324

Step-by-step explanation:

In given triangle ABC, we have been give values of angle B=55 degree, angle C is right angle and b=16.

Now using those values, we need to find the value of side b.

apply formula of sin

$\sin\left(B\right)=\frac{AC}{AB}$