3 years ago

Which statement is not correct?

Mathematics

1 answer:

Pachacha [2.7K]3 years ago

8 0

Answer:

b.) because it is over 90*

Step-by-step explanation:

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A thermometer is removed from a room where the temperature is 70° F and is taken outside, where the air temperature is 40° F. Af

fgiga [73]

Answer:

53.3324

Step-by-step explanation:

given that a thermometer is removed from a room where the temperature is 70° F and is taken outside, where the air temperature is 40° F.

By Newton law of cooling we have

T(t) = $T+(T_0-T)e^{-kt}$

where T (t) is temperature at time t,T =surrounding temperature = 40, T0 =70 = initial temperature

After half minute thermometer reads 60° F. Using this we can find k

$T(0,5) = 40+(70-40)e^{-k/2} = 60\\e^{-k/2} =2/3\\-k/2 = -0.4055\\k = 0.8110$

So equation is

$T(t) = 40+(30)e^{-0.8110t}\\$

When t=1,

we get

$T(1) = 40+(30)e^{-0.8110}\\\\=53.3324$

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3 years ago

30 flowerpots. he plants 10 seeds in each pot. how many seeds does he plant?

Dmitriy789 [7]

There are 10 seeds for each flower pot. There are 30 flower pots. For this question you have to multiply.
30×10=300

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4 years ago

Graph the image of G(<br> –<br> 9,8) after a rotation 270° counterclockwise around the origin.

Tatiana [17]

Answer:

(5x+3x)+6x=5x+(3x+6x)

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2 years ago

T+1= -3 T=? Solve the equation

Lostsunrise [7]

T+1=-3
T=-4. Hope it help!

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3 years ago

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Dreyfus cashed a check for $145. The teller gave him five $20 bills, two $20 bills, and f $1 bills. How many $1 bills did he get

viktelen [127]

Answer:

5 singles

Step-by-step explanation:

5 $20= 100

2 $20= 40

remainder is 5 singles

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3 years ago

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