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Leno4ka [110]
3 years ago
15

Pls help(ill mark brainlest)

Mathematics
1 answer:
gavmur [86]3 years ago
7 0

Answer:

i think c

Step-by-step explanation:

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IS ANYONE GOOD AT CALCULUS? PLEASE HELP!!! The rate at which a certain radioactive isotope decays is given by = negative 0.0032
victus00 [196]

Answer:

90 days.

Step-by-step explanation:

dy/dt = - 0.0032y

dy = -0.0032y dt

dy/y = -0.0032 dt

Integrating:

ln y = -0.0032t + c     where c is some constant

y = e^(-0032t) + e^c

y = A e^(-0032t)   where A is a constant.

At time 0 we can let y = 1 so in that case A = 1

When there is 0.75 of y left:

0.75 = e^-0032t

ln 0,75 =  -0032 t

t = ln 0.75 / -0032

t = 90.

6 0
3 years ago
The album The Best of Radiohead, by Radiohead, has a list price of $13.83, and the album The King of Limbs, by Radiohead, has a
neonofarm [45]

Answer:

206 albums The King of Limbs and 34 albums The Best of Radiohead sold

Step-by-step explanation:

Let x be the no. of The album The Best of Radiohead sold .

We are given that total  sales of both albums in one week is 240 albums.

So, number of albums The King of Limbs = 240 -x

Cost of 1 album The Best of Radiohead by Radiohead is $13.83

Cost of x album The Best of Radiohead by Radiohead = 13.83x

Cost of 1 album The King of Limbs, by Radiohead= $7.83

Cost of (240-x) album The King of Limbs, by Radiohead=7.83(240-x)

The total cost revenue of both albums in that week is 2083.20

So,  13.83x+7.83(240-x)=2083.20

13.83x+1879.2-7.83x=2083.20

13.83x-7.83x=2083.20-1879.2

6x=204

x=\frac{204}{6}

x=34

The no. of The album The Best of Radiohead sold is 34

Number of albums The King of Limbs = 240 -x =240-34=206

Hence 206 albums The King of Limbs and 34 albums The Best of Radiohead sold

6 0
3 years ago
CAN SOMEONE PLSSS HELP ME EVALUATE??!!!<br><br><br> 5!4! =
Agata [3.3K]
The answer is 2880 .

Hope this helps
5 0
4 years ago
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A coat with an original price tag of $400 was marked down by 40%. You have a coupon good for an additional 25% off. What is the
VMariaS [17]

Answer:

65%=$260

Step-by-step explanation:

40%+25%=65%

65% of 400

65/100*400

=$260

7 0
2 years ago
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Which expression is equivalent to 3(x + 6)?
Gnesinka [82]

Step-by-step explanation:

the answer is 3x+18. vb. bbb b

8 0
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