Answer:
4.8 hours
Step-by-step explanation:
The formula for half life is given as:
t½ = t × In(2)/In(No/Nt)
Where
t½ = Half life
t = time in hours = 4
No = Initial amount = 10mg
Nt = Final amount after 3 hours = 6.5 mg
t½ = 3 × In(2) /In(10/6.5)
t½ = 4.8271216522281 hours
Approximately = 4.8 hours
8^3 * 8^7 = 8^(3+7) = 8^10
The answer is 81 2/5 or 81.4. You have to change 9 1/4 and 8 4/5 to decimals and then multiply.
6x+4y+9
This is written in y=mx+b format
I hope this helps!!!!!
Substitute x= 3 and calculate
f(3)= 2•9+5• sqrt( 1)
f(3)= 18+5= 23