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kvv77 [185]
3 years ago
5

The half life of a drug in the bloodstream is 18 hours. What fraction of the original drug dose remains in 36 hours? in 72 hours

?
Mathematics
1 answer:
xxTIMURxx [149]3 years ago
5 0

Answer:

1/4 in 36 hours

1/8 in 72 hours

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Three is a zero of the equation x^3-4x^2-3x+18=0
mylen [45]

Answer:

You did not list any choices but that factors into:

(x +2) * ( x -3) * (x -3) = 0

Making the "zeroes" -2, 3 and 3

Step-by-step explanation:


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6 0
3 years ago
Read 2 more answers
Tina spends $50.86 at the craft store. She buys 5 yards of fabric at $8.98 per yard and 2 spools of thread. What is the price of
irina1246 [14]
She spends $50.86.
Cost for 1 yard of fabric is $8.98.
So to find the the cost of 5 yards of fabric, multiply $8.98 x 5 = $44.9. Therefore for the 5 yards of fabric she paid $44.9.

To find how much she paid for 2 spools of thread subtract the amount she spent at the craft store and the cost for the 5 yards of fabric.
&50.86 - $44.9 = $5.96.
Therefore the cost of 2 spool of thread is $5.96 / 2 = $2.98

Therefore the cost of 1 spool of thread is $2.98.



To check if it’s correct just add the cost of the 5 yards of fabric and the 2 spools of thread.
$44.9 + $5.96 = $50.86
4 0
3 years ago
Zelda completed the right column of the table to help her find the difference.
Zinaida [17]

Answer:

His error occurred in the last step

Explanation:

He was supposed to calculate -

\frac{5}{6}  - \frac{1}{9} \\or\\\frac{15}{18}  - \frac{2}{18} \\

which would equal -

\frac{13}{18} \\not\\\frac{17}{18}

Because he added instead of subtracted.

Hope this helps!

<em>stay safe</em>

5 0
3 years ago
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