D If it’s not D than A sorry if I’m wrong
<span>half-life means you divide by 2
21.6 / 3.6 = 6 hf (hf = half-life)
then you divide by 2^6
6.02 x 10^23 / 2^6 = 9.40625 x 10^21 atoms
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3hf ===> 2^3
10.0 / 2^3 = 1.25 gram (remaining)
answer : 10 - 1.25 = 8.75g
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128 / 2^n = 2
64 = 2^n
n = 6
24 /6 = 4
4 days is the half-live of the sample
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2.5/4.46 of 50% initial mass
(2.5/4.46) x 0.5 x 2 = 0.5605 g
answer: 2 - 0.5605 = 1.4395 g
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2^7 = 128
so 7 half-lifes
7* 8040 = 56200 days
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the time of 10 half-lifes
= 10 x 0.334s = 3.34s </span><span>
</span>
Answer: You are right.
Step-by-step explanation: The amount of gas you have will only get you 115.2 Miles and the gas station is 116 miles away.
19.2 % 3 = 6.4
6.4 x 18 = 115.2
X/4 = 3/8
multiply both sides by 4 to isolate the variable
x = 3/2
The correct answer is B) 3/2.
576
Explanation: 2+2 = 4
4x9 = 36
36x16 = 576
Pls mark brainliest!
