Answer: 
Step-by-step explanation:
If you meant to solve for "z", then refer to the attachment below.
Answer:
7
Step-by-step explanation:
Just multiply all numbers together.
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The answer is because 3 squared =9
Risk - 5 = 16. It is just mathematical language.
Answer: The level of aspirin (mg) will be in your bloodstream in 4 hours = 35.70 mg.
Step-by-step explanation:
If the amount is decreasing by r%, then the final amount is given by :-

, where P = initial value , t= time
Given: P= 200 milligram, r= 35% = 0.35, t= 4 hours
The level of aspirin (mg) will be in your bloodstream in 4 hours = 

Hence, the level of aspirin (mg) will be in your bloodstream in 4 hours = 35.70 mg.