477>80 is correct
-4.5<3 this one is also correct
I think you should add do not subract
Answer:
5 minutes
Step-by-step explanation:
There are 60 seconds in 1 minute.
We are converting 300 seconds to minutes
300 seconds * 1 minute /60 seconds
The seconds cancel leaving us with minutes as our units
300/60 minutes
5 minutes
Answer: x= -8.5
Step-by-step explanation:
-4x+8=42
-8 -8
-4x=42-8
-4x=34
x=-34/4
x=-17/2
x= -8.5
Answer:
k ≈ - 0.069
Step-by-step explanation:
Given
A = 800 
Substitute A = 400 and t = 10 into the equation
400 = 800 
( divide both sides by 800 )
0.5 = ( take the ln of both sides )
ln = ln0.5
10k lne = ln0.5 [ lne = 1 ]
10k = ln 0.5 ( divide both sides by 10 )
k = 
≈ 0.069 ( to the nearest thousandth )
