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photoshop1234 [79]
2 years ago
6

Which of the following is a proportion? 9/12 = 8/10 3/4 = 9/12 6/8 = 8/12 12/18 = 19/16

Mathematics
1 answer:
goblinko [34]2 years ago
4 0

Answer:

3/4=9/12

Step-by-step explanation:

3x3= 9

4x3= 12

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The data in the chart shows the maximum and corresponding resting heart rate of a healthy 20 year old man. Fit a regression line
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3 years ago
The core melt- down and explosions at the nuclear reactor in Chernobyl in 1986 released large amounts of strontium-90, which dec
elena-14-01-66 [18.8K]

If S(t) is the amount of strontium-90 present in the area in year t, and it decays at a rate of 2.5% per year, then

S(t+1)=(1-0.025)S(t)=0.975S(t)

Let S(0)=s be the starting amount immediately after the nuclear reactor explodes. Then

S(t+1)=0.975S(t)=0.975^2S(t-1)=0.975^3S(t-2)=\cdots=0.975^{t+1}S(0)

or simply

S(t)=0.975^ts

So that after 50 years, the amount of strontium-90 that remains is approximately

S(50)=0.975^{50}s\approx0.282s

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We can confirm this another way; recall the exponential decay formula,

S(t)=se^{kt}

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3 years ago
Can someone please help? i’ll make you a brainliest.
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b

Step-by-step explanation:

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2 years ago
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Answer:

Step-by-step explanation:

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Find the equation in terms of x of the line through the points (-4,-4) and (5,-5)
zhuklara [117]

Answer:

The answer to your question is:  y = -1/9 x - 40/9

Step-by-step explanation:

Data

A (-4 , -4)

B (5, -5)

Formula

m = (y2 - y1) / (x2 - x1)

y = mx + b

(y - y1) = m(x - x1=

Process

m = (-5 + 4) / (5 + 4)

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( y +4) = -1/9 (x + 4)

y + 4 = -1/9 x - 4/9

y = -1/9 x - 4/9 - 4

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3 years ago
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