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3 years ago

7

Find the volume of and shape 3 4 4 6 2

1 answer:

navik [9.2K]3 years ago

5 0

I dont understand the question

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Which of the following is a geometric sequence? Help pleaseee!

ioda

Answer: B

Step-by-step explanation:

Division of components are consistent - the same

7 0

3 years ago

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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

3 years ago

Please help fast, I will mark BRAINLIEST 10. Find the rule. *

AURORKA [14]

Answer:

the answer to the question is y=x+2.

8 0

3 years ago

If a population is _______, a sample of the population could be _______.

lord [1]

Answer:

<u>B</u>

Step-by-step explanation:

If a population is the entire school faculty, a sample of the population could be math teachers.

Always remember a sample is a part of the larger group.

7 0

2 years ago

Which is the correct classification of √18?

seropon [69]

Answer:

irrational number, non-repeating decimal

Step-by-step explanation:

√18 = √9·√2 = 3·√2.

√2 is an irrational, non-repeating decimal (my calculator shows it to be approx. 1.414213562..... )

and so √18 is the same.

7 0

3 years ago

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