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Karo-lina-s [1.5K]
2 years ago
8

Which statement best describes Jim's first error

Mathematics
1 answer:
umka21 [38]2 years ago
6 0
Can u show the whole question
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Calculate the amount of hcn that gives the lethal dose in a small laboratory room measuring 12.0 ft×15.0 ft×8.50ft.
Anarel [89]
Dimensions of the room in cm = 2.54 x 12 by 15 x 2.54 by 2.54 x 8.5 = 30.48 by 38.1 by 21.59

Volume of the room in cubic cm = 30.48 x 38.1 x 21.59 cubic cm = 25,072.21 cubic cm

Given that the density of air at room temperature is 0.00118g/cm^3, thus the mass of air in the room = 25,072.21 x 0.00118 = 29.59 g = 0.0296 kg

Given that the lethal dose of HCN is approximately 300 mg HCN per kilogram of air when inhaled, thus the <span>amount of HCN that gives the lethal dose in the small laboratory room is given by 300 x 0.0296 = 8.88 mg.</span>
7 0
3 years ago
Rationalize the denominator in each expression. That is, rewrite the expression so that there is a rational expression in the de
ad-work [718]

Answer:

explanations: we multiply with a rational surd

(x-9)*√(x+9)/(√(x-9)*√(x+9)

=(x-9)√(x+9)/

x {}^{2}   - 9

B.( x-9)/√x+3 =( x-9)*(√x-3)/(√x+3)*(√x-3)

= (x-9)*(√x-3)/x-9

=√x-3

7 0
3 years ago
Carrie has $5.50 saved. She wants to buy a book that costs $15.00, including tax. Carrie plans to save $1.25 cach Friday What is
VashaNatasha [74]

Answer:

8

Step-by-step explanation:

           

5 0
3 years ago
Leonardo makes the following purchases at the store: 1 backpack for $16.89 5 spiral notebooks for $1.19 each 1 pack of mechanica
Alex787 [66]
I believe the correct answer is he paid the right amount

6 0
3 years ago
Read 2 more answers
I don’t know how to solve this help me please
uysha [10]
I think your answer is that

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3 years ago
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