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coldgirl [10]
2 years ago
6

Suppose you make coffee and it starts off just too hot to drink, so you put it in the refrigerator temporarily to cool it off. I

f the original temperature is 190 degrees Fahrenheit and the refrigerator is 36 degrees Fahrenheit, what will the temperature of the coffee be after 3 minutes? (k = 0.12)
Mathematics
1 answer:
Alex2 years ago
5 0

Answer:

Step-by-step explanation:

f(x)= 36( 1 - 0.12)^x. F(x)= 36(0.88)^3. f(x)= 95.04    190-95.05 = 94.95 degree.

Because the temperature is going down, we will use (1-0.12) instead of (1+0.12). X=3 because it is what temperature after 3 min. x= time.

I don't understand the question that well, but please don't report me. I will fix it if I can.

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sukhopar [10]

Answer:

b. present money

Step-by-step explanation:

the concept that States an amount of money today is worth more than that sum amount in the future. future money is not worth much then the amount received today.

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zhannawk [14.2K]

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B. 4/15 of the flat

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Ahat [919]

Answer:

w is greater than or equal to 358

7 0
2 years ago
3 Parts with a picture. Thanks!
tatuchka [14]

We have $8.50 an hour gross minus $2.15 an hour tax and bennys.  Then $3.75 daily expense.  In one week our net take-away y after x hours is

y = x(8.50 - 2.15) - 5(3.75)

That's the answer, or we can simplify it to

Answer: y = 6.35 x - 18.75

Answer: The slope, 6.35, is the net dollars per hour <em>before weekly expenses.</em>

Answer: The y intercept, -18.75, is the weekly expense, negative because it's an expense.

To make $120 in a week, we solve for x where y=120

120 = 6.35x - 18.75

138.75 = 6.35 x

x = 138.75 / 6.35 = 21.8503937007874

That wasn't the nice round number I was expecting/hoping for.  I don't see a mistake so let's go with

Answer: 21.85 hours to make $120

7 0
3 years ago
Please help &lt;3 i have a F in math
ikadub [295]

Answer:

5/6

Step-by-step explanation:

The slope is y change over x change so...

-2-3 over 1-7 which is -5 over -6 which is simplified to 5/6.

Hope this helps :D

3 0
3 years ago
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