Answer:
Step-by-step explanation:
QR = 27 ÷ 2 = 13.5
Well when you multiply it would most likely be 180

2) 5.625 mg will be left
Explanation:
1) Half-life = 17.5 days
initial amount of Arsenic-74 = 90 mg
To get the equation, we will use the equation of half-life:


2) we need to find the remaining amount of Arsenic-74 after 70 days
t = 70

So after 70 days, 5.625 mg will be left
Answer:
77%
Step-by-step explanation:
23 divided by 30 is 0.766666, which percent-wise is rounded to 77% :)
Answer:
7
Step-by-step explanation:
1. Do 49÷7 to get the average of 7