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marysya [2.9K]
4 years ago
8

HELP! HMWRK DUE ALREADY AND ITS LATE

Mathematics
2 answers:
aivan3 [116]4 years ago
5 0

Answer:


Step-by-step explanation:

Your answer is H.


-15 - 20 is -35. H.

Harlamova29_29 [7]4 years ago
5 0
H. -35 feet That's the answer. -15 + -20 = -35
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Please help I did not get what I was supposed to do
Sladkaya [172]

Answer:

See below

Step-by-step explanation:

\sqrt[3]{49}  = 3.65930571002 \approx3.66 \\  \\ so \:  \sqrt[3]{49} should \: lie \: at \: 3.6 \: which \:  \\ fall \: between \: 3 \: and \: 4.

Actually Lin did a mistake, she obtained square root and not cube root.

8 0
3 years ago
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Find x of the angles are supplementary 3x-2 and 41 degrees ?
tia_tia [17]

Answer:

x = 47

Step-by-step explanation:

3x - 2 + 41 = 180 {Supplementary}

3x   + 39 =  180

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3 0
3 years ago
Newton's law of cooling states that the temperature of an object changes at a rate proportional to the difference between its te
Aleonysh [2.5K]

Answer:

t=5.18 minute

Step-by-step explanation:

Using Newton's law of cooling

\frac{dT}{dt}=-k(T-T_{s})

T is temperature of a cup of coffee at any time t T_{s}, is the temperature of the surrounding and k is a constant of proportionality in this negative because temperature is decreasing.

T(0)=190\\T(1)=170\\T_{s}=66

\frac{dT}{dt}=-k(T-T_{s})\\\frac{dT}{(T-T_{s})}=-k*dt\\\int\limits {\frac{1}{T-T_{s} } } \, dT=-\int\limits {k} \, dt\\ln(T-T_{s})=k*t+C\\e*ln(T-T_{s})=e^{k*t+C} \\T-T_{s}=e^{k*t}*e^{C}\\e^{C}=C\\T-T_{s}=e^{k*t}*C\\T=T_{s}+e^{k*t}*C

To find constant knowing the time and the temperature the first step of the change of energy in cup of coffee

T=T_{s} +e^{-k*t}*C\\ C=190-66=124\\170=66+124*e^{-k*2}\\ 170-66=124*e^{-k*2}\\ln(\frac{104}{124})=ln*e^{-k*2}\\-0.175=-k*2\\k=0.08794

Now using the constant of decreasing can find the time to be a 145 temperature the cup of coffee

145=66+124*e^{-k*t} \\145-66=124*^{-0.087*t}

ln(0.637)=ln*e(-0.087*t)\\-0.45=-0.087*t\\t=5.18minutes

4 0
4 years ago
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Answer:

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Step-by-step explanation:

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The greatest common factor of 10 and 20 is 10.

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3 years ago
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