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Murljashka [212]
3 years ago
12

?..................................................

Mathematics
2 answers:
Lemur [1.5K]3 years ago
5 0
Dang someone already got the answer
liberstina [14]3 years ago
4 0

Answer:

400

Step-by-step explanation:

240 is 60% of 400. That means that 400 people are in the class hope this helps.

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The temperature of a cup of coffee varies according to Newton's Law of Cooling: dT dt equals negative k times the quantity T min
denis23 [38]

Answer:

  (b)  67

Step-by-step explanation:

A solution to the differential equation describing the temperature according to Newton's Law of Cooling could be written as ...

  T = (final temp) + (initial difference)×(decay factor)^t

where the decay factor is the fraction of change during 1 unit of time period t.

__

Here, the initial difference of 100-25 = 75 degrees decays to 90-25 = 65 degrees in 1 minute. So, the units of t are minutes, the decay factor is 65/75, the initial difference is 75 degrees, and the final temperature is 25 degrees. That lets us write the equation as ...

  T = 25 +75(65/75)^t

Then for t=4, the temperature is ...

  T = 25 +75(13/15)^4 ≈ 67.3 . . . . degrees

After 4 minutes the temperature of the coffee is about 67 degrees.

4 0
2 years ago
A triangle can have one right angle.<br> a. True<br> b. False
iragen [17]
True because a triangle must have 3 angles that add up to 180 degrees and, since a right angle is 90 degrees, it cannot have 2 right angles
3 0
3 years ago
39.39÷3 Show ur work plz
kiruha [24]

Answer:

13.13

Step-by-step explanation:

39.39 ÷ 3

13.13

There is not a lot of work

Looking at it we can tell that 3 will go into 3 one time, and 3 will go into 9 three times because:

1 x 3 = 3

3 x 3 = 9

3 0
3 years ago
Read 2 more answers
2. Identify the solution to the system of equations graphed below.
12345 [234]
(-4, 1)

the solution is always where the two points meet!! :)
7 0
3 years ago
Read 2 more answers
URGENT!
serg [7]

Answer:

number one is the appropriate answer for this question

7 0
3 years ago
Read 2 more answers
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