3 years ago

Element X is a radioactive isotope such that every 20 years, its mass

Mathematics

1 answer:

faust18 [17]3 years ago

3 0

Answer:

12.1

Step-by-step explanation:

y=a(1/2)^t/h

270=410(1/2)^t/20

Divide both sides by 410

0.6585365854 = (1/2)^t/20

Log Both sides

Log(0.6585365854) / Log(1/2)

.6026645024= t/20

20 x .6026645024 = t

12.05329005 to the nearest tenth is 12.1 = t

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Step-by-step explanation:

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there are a total of 100 balloons.if the ratio of yellow balloons to blue balloons is 8 to 12,how many of them are yellow?

IrinaK [193]

The ratio of yellow balloons to blue balloons is 8:12
Then there are 100 balloons. Making the equation, we are able to have:
8X + 12X = 1000
20x = 1000
X = 50.

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Blue balloons = 12X = 12 * 50 = 600 blue balloons

So there are 400 yellows balloons.

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4 years ago

The ratio x : y is equal to 2 : 5, and y is 80% of z. Write an equation to represent the proportional relationship between x and

Mila [183]

Answer:

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Step-by-step explanation:

Given

x : y = 2 : 5, y is 80% of z

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Comparing the values of y:

2.5x = 0.8z
x/z = 0.8/2.5
x/z = 0.32
x/z = 32/100
x/z = 8/25
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3 years ago

What is number form of 'the product of six and a number'

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Answer:

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Step-by-step explanation:

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4 years ago

Which steps of steps will translate f(c)=6^x to g(x)=6^x-5-7

olga_2 [115]

I hope this was what you where looking for

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