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2 years ago

HELP PLEASE????????????????????

Mathematics

2 answers:

lora16 [44]2 years ago

5 0

Answer:

20x - 8

Step-by-step explanation:

Since we have the length and height of the rectangle we just multiply each by 2. This is because the length is the same on both sides and the height is too. The equation would look like this:

(5x-4 + 5x -4) + (5x +5x) = 10x -8 + 10 x = 20x -8

Dafna11 [192]2 years ago

3 0

20x-8 for sure I’m pretty sure

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20 out of 50 rolls of a number cube resulted in a 2 being rolled.Based on this imformation, if the cube was rolled 220 times,how

jolli1 [7]

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88 rolls of 2.

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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

$S(t)=0.975^ts$

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

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

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Then after 50 years, we have

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3 years ago

What is one tenth of 200?

jekas [21]

20 is one tenth of 200

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3 years ago