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Lina20 [59]
2 years ago
9

You have 976 grams of a radioactive kind of rhodium. How much will be left after 120 seconds if its half-life is 30 seconds?

Mathematics
1 answer:
erik [133]2 years ago
5 0

Answer:

61 grams

Step-by-step explanation:

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HELP NOW!!! 20 POINTS AND URGENTLY NEEDED!!!!!!!!!!!!!!
Lunna [17]

So basically here is the answer mate!

2x  +  7y  =  3-------------------------(substitute x's value here, i.e., x = -4y)

2( -4y )  +  7y  =  3

-8y  +  7y  =  3

-1y  =  3

y  =  -3------------------------(  1  )

Since x  =  -4y

             =  -4 (  -3  )  --------------------------( since we found the value of y)

             =  12

Here is the answer for  x  = 12  ,  y  =  -3

Mark my anwer as the brainliest please !  :)

4 0
3 years ago
3x + 5 ^ 2x + 15
Nina [5.8K]

Answer:

Answer:is A

A) Molly walked 5 miles and Mary walked 15 miles last month. If Molly walks 3 miles per week and Mary walks 2 miles per week, how long will it be before Molly has walked more miles than Mary?

Step-by-step explanation:

An inequality can have more than one solution. The set of all solutions of an inequality is called the solution set. The symbol ≥/ means “is not greater than or equal to.”

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3 years ago
Find the first derivative of f'(a) using first principle, for the given value of
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Answer:

12.4

Step-by-step explanation:

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Lisa studies 2
olasank [31]
She would have to study about 48 hours to get a score of 97. 
Hopefully that helped! :) 
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3 years ago
I am dumb ..... so what is the formula of a triangle for perimeter... yeah i know
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Answer:

The formula for the perimeter of a triangle is Side A + Side B + Side C.

The formula for the area of a triangle is Base x Height = total divided by 2.

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3 years ago
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