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3 years ago

Bismuth-214 has a half-life (50%) of approximately 20 minutes. Find the amount of Bismuth-214 left

Mathematics

2 answers:

ivolga24 [154]3 years ago

8 0

La verdad no se la respuesta perdón

Greeley [361]3 years ago

3 0

Answer: 3.36

Step-by-step explanation:

f(x)=214(1-.50)^6 6= amount of times 20 min goes into 2 hrs

f(x)=214(.50)^6

.5^6=.0157

f(x)=214(.0157)

3.36

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Dr. Anderson found that 18 out of 30 children in the village tested positive for chicken pox. At this rate, how many would test

Artist 52 [7]

Answer:number of children negative for chicken pox=28

Step-by-step explanation:

Number of children positive for chicken pox =18 out of 30

Therefore number of children negative for chicken pox is 12 out of 30 ie ( 30-18)

Such that the ratio of positive tested chicken pox children to negative tested chicken pox children =18:12

Therefore total ratio =18 +12=30

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3 years ago

Cos³x.tan²x - cosx = ?

melamori03 [73]

tan x = sin x/cos x

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3 years ago

What equation models it’s position, y, with respect to time, x?

mr_godi [17]

Answer:

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Step-by-step explanation:

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3 years ago

Read 2 more answers

A farmer finds there is a linear relationship between the number of bean stalks, n, she plants and the yield, y, each plant prod

-Dominant- [34]

Answer:

Step-by-step explanation:

Given that a farmer finds there is a linear relationship between the number of bean stalks, n, she plants and the yield, y, each plant produces

When we consider this graph as a straight line, the two points lying on the line would be

(30, 30) and (34, 28) taking n as horizontal and y vertical

Using two point equation we find that

the equation of the line is

$\frac{y-y_1}{y_2-y_1} =\frac{x-x_1}{x_2-x_1}$

Substitute the points as x =n

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3 years ago

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Sliva [168]

Answer:

(4) y=(x-3)²-4

I dont have much evidence to give

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2 years ago