Answer:
4x2
Step-by-step explanation:
4x2 is the answer cause the right side is not equal
1 * 60 * 60 = 3600 (seconds in 1 hour)
3600 * 6 = 21600 (seconds in 6 hours)
3600 * 0.4 = 1440 (seconds in 0.4 hour)
21600 + 1440 = 23040 (6 hours + 0.4 hours)
your answer is 23040
Answer:

So it would takes approximately 6.9 hours to reach 32 F.
Step-by-step explanation:
For this case we have the following differential equationÑ

We can reorder the expression like this:

We can use the substitution
and
so then we have:

IF we integrate both sides we got:

If we apply exponential in both sides we got:

And if we replace w = u-T we got:

We can also express the solution in the following terms:

For this case we know that
since w ehave a cooloing,
, we have this model:
And if we want that the temperature would be 32F we can solve for t like this:



If we apply natural logs on both sides we got:


So it would takes approximately 6.9 hours to reach 32 F.
-5=-2/9x.
x=22.5 / x=45/2
-3x + 6 = 18...subtract 6 from both sides
-3x = 18 - 6
-3x = 12...divide both sides by -3
x = -12/3 reduces to -4 <===