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vivado [14]
3 years ago
12

Nothing I find in my notes or online doesn't show me how to solve this. I know how to set it up, but brainly ain't letting me su

bmit 2 pics.​

Mathematics
1 answer:
Anon25 [30]3 years ago
8 0

Answer:

x=8

Step-by-step explanation:

Draw it out.... 11x-4=3x+60

(add 4 to both sides)(subtract 3x from both sides)

8x=64

(divide 8 from 64)

x=8

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nasty-shy [4]

Answer:

It will take approximately 3.34 hours for the drug to decay to 90% of the original dosage

Step-by-step explanation:

As suggested, we use the formula for exponential decay:

A(t)=A_0\,e^{-k\,t}

From the given information, the half life of the drug in blood id 22 hours, so that means that it takes that number of hours to go from the initial value A_0, to a final value equal to A_0/2. Using this information we can find the decay rate "k" by solving for this parameter in the formula, and using the natural log function to bring the exponent down:

A(t)=A_0\,e^{-k\,t}\\\frac{A_0}{2} =A_0\,e^{-k\,*22}\\\frac{A_0}{A_0*2} =e^{-k\,*22}\\\frac{1}{2} =e^{-k\,*22}\\ln(\frac{1}{2})=-k\,*22\\ k=-\frac{ln(\frac{1}{2})}{22} \\k=0.0315

Now we use this value for the decay rate "k" to calculate how long it would take to decay to 90% of the original dose;

A(t)=A_0\,e^{-0.0315\,t}\\0.9*A_0} =A_0\,e^{-0.0315\,t}\\\frac{0.9*A_0}{A_0} =e^{-0.0315\,t}\\0.9 =e^{-0.0315\,t}\\ln(0.9)=-0.0315\,t\\ t=-\frac{ln(0.9)}{0.0315} \\t=3.3447\,hours

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3 years ago
Which equation is graphed here?
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y-4= -3/2(x+2)

Step-by-step explanation:

⋆✨ANSWERED BY KAKASHI ʕ•㉨•ʔ✨⋆

✨BRAINLIEST WILL BE APPRECIATED✨

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8 0
3 years ago
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3 years ago
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salantis [7]

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2 / 3 loads

Step-by-step explanation:

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Number of cups used for each load of laundry = 18 cups

The loads of laundry Eric can do is thus :

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