Explanation:
First we will convert the given mass from lb to kg as follows.
157 lb = 
= 71.215 kg
Now, mass of caffeine required for a person of that mass at the LD50 is as follows.

= 12818.7 mg
Convert the % of (w/w) into % (w/v) as follows.
0.65% (w/w) = 
= 
= 
Therefore, calculate the volume which contains the amount of caffeine as follows.
12818.7 mg = 12.8187 g = 
= 1972 ml
Thus, we can conclude that 1972 ml of the drink would be required to reach an LD50 of 180 mg/kg body mass if the person weighed 157 lb.
Answer:
for this i uploaded i screenshot
Explanation:
Answer:
B
Explanation:
to see how fast she is going per second, you would have to divide the distance traveled by the seconds it took to travel the distance
For the answer to the question above, if your question is a lever with a pivot and which sounds more likely ...then I would say from the principle of moments: F1*d1=F2*d2
<span>given F1=high and F2=low ---> d1 must be low and d2 high for the equations to be balanced. </span>
<span>So the answer is simply: Inversely</span>