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Ronch [10]
2 years ago
5

The half life of a particular radioactive substance is 1 year. If yiu started with 50 grams of this substance, how much of it wo

uld remain after 3 years.
Mathematics
1 answer:
Alenkinab [10]2 years ago
5 0

Answer:

Remaining amount is 6.25 grams

Step-by-step explanation:

I had the same question not to long ago

one year what you would be left with is 50/2 which is 25 gram

second year, you would be left with 50/4 which is 12.5

third year what's left is 50/8 i.e 6.25

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What is the period of the graph of y = 5cos(6x – 1) + 3?<br> O A.
evablogger [386]

Step-by-step explanation:

The coefficent of the x variable is b.

The formula for the period is

\frac{2\pi}{ |b| }

Here, b is 6 so we have

\frac{2\pi}{ |6| }  =  \frac{\pi}{3}

So the period is pi/3, or 60 degrees

5 0
2 years ago
The area of a rectangular garden is 5828 m
evablogger [386]

Answer:

The length of the garden is 94 m.

Step-by-step explanation:

you do 5828 m. divided by 62m. and that is how you get your answer of 94 m.

6 0
3 years ago
Read 2 more answers
Ivan has $1098 worth of $12 and $14 stock shares. The number of $14 shares is seven more than
Dafna1 [17]

Answer:

Number of 12$ Shares? 25

Number of 14$ Shares? 57

Step-by-step explanation:

Let x = number of $12 shares.

Let y = number of $14 shares.

"Ivan has $1098 worth of $12 and $14 stock shares."
12x + 14y = 1098

The number of $14 shares is seven more than twice the number of $12 shares.

y = 2x + 7

We have a system of equations.

12x + 14y = 1098

y = 2x + 7

We can use the substitution method since the second equation is already solved for y. Substitute 2x + 7 for y in the first equation.

12x + 14(2x + 7) = 1098

12x + 28x + 98 = 1098

40x = 1000

x = 25

There are 25 $12 shares.

y = 2x + 7 = 2(25) + 7 = 57

There are 57 $14 shares.

Check:

25 × $12 + 57 × $1`4 = $300 + $798 = $1098

The total value is correct, so the answer is correct.

4 0
2 years ago
Please help me. I'm lost.
amm1812
Yes cause he can decrease the perimeter in any way and it would change the area and idk the other 2 in the front
6 0
3 years ago
Graph (-3, 2) (5, 2) (5, -3) and (-3, -3) and find the perimeter.
Nostrana [21]

Answer:

26

Step-by-step explanation:

Firstly, plot the points on graph paper which you can find on the internet. The first number in the ordered pair, (the ones in parenthesis), is the x coordinate. The other number is the y coordinate. Put these onto a graph which is attached. The perimeter is 26.

3 0
2 years ago
Read 2 more answers
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