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2 years ago

I will give brainliest.

2 answers:

6 0

When you divide fractions multiply the first fraction by the reciprocal of the second

-5/7 divide by 1/5 turns into
-5/7 multiply by 5/1
Answer is -25/7

emmainna [20.7K]2 years ago

5 0

The answer would bee -25/7

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to make hummingbird nectar you must use 4 cups of water and 1 cup of sugar. what is the ratio of water to sugar

Nutka1998 [239]

Your ratio is 4:1 because it takes 4 cups of water for every cup of sugar.

6 0

2 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

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

or about 28% of the original amount.

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

$S(t)=se^{kt}$

where $t$ is measured in years. We're told that 2.5% of the starting amount $s$ decays after 1 year, so that

$0.975s=se^k\implies k=\ln0.975$

Then after 50 years, we have

$S(50)=se^{50k}\approx0.282s$

5 0

2 years ago

Whixh list of numbers is ordered from least to greatest?

Rzqust [24]

Answer:

B is the solution

Step-by-step explanation:

-6.53 is the furthest from 0

-6 1/4 is closer to 0

6.57 is positive and more than 0

6 3/4 is also positive and more than 6.57

8 0

7 months ago

Need ko na po this now please answer this question thank you po

Umnica [9.8K]

Answer:

Step-by-step explanation:

4 0

2 years ago

Read 2 more answers

X/-6-8> -12 PLEASE HELP AND SOLVE

Daniel [21]

Answer:

Step-by-step explanation:

Solve for x by simplifying both sides of the equation, then isolating the variable.

x=24

3 0

1 year ago

Read 2 more answers