Answer:
k = - 6.6667
Step-by-step explanation:
this is quite very simple to begin. I would encourage you take other practice questions similar to help with understanding it.
let us begin.
Given that ;
dT/dt = k ( Tm - T) where Tm is the temp of the medium
dT/dt = 5 degrees Celsius per minute when T = 70
so we have that, 5 = k ( 25 - 70)
remember to convert 5 degree celsius per minute to seconds
we have that;
5*60(sec) = k ( 25 - 70)
k = 5*60 / ( 25 - 70)
k = - 6.6667
note K is negative because we consider it for cooling process (temp decreasing).
cheers i hope this helps!!!
60+30
=90 ..180-90=90 use paythagorus fomular tan=opposite over adjacent
Answer:
200
Step-by-step explanation:
First, we know that 1 meter=100 centimeters, so we need to find a common measurement. Lets right it all as meters, so we dont get confused. Then we can find the total area of the floor by multiplying the too side lengths together:
400 centimeters x 200 centimeters= 80000 centimeters!
The total area of the floor is 80,000 centimeters
Now find the area of each tile:
20 centimeters x 20 centimeters= 400 centimeters
Now to find how many of those tiles can fit in that floor, we divide 80,000 by 400.
80,000/400=200
He needs 200 tiles.
Hope this helps!
Answer: 55%
Step-by-step explanation:
2475/5500 = .45
He sold it for 45% of the price, so it went down by 55%
Step-by-step explanation:
The slope-intercept form of an equation of a line:
- slope
- y-intercept
19) and 20) you have in other your question.