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scoray [572]
3 years ago
13

I have a challenge. All of you that read this, comment or make an answer. After you are done, do the same thing! Make a free bra

inliest and the first person that answers gets it. And thank the person by going to their profile! Whoever answers this first gets brainliest!
Mathematics
2 answers:
Tresset [83]3 years ago
7 0

seems pretty odd but I guess there's nothing else to do during quarantine

padilas [110]3 years ago
5 0

Answer:

ok

Step-by-step explanation:

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What is 64% of 680kg
Anuta_ua [19.1K]

Answer:

435.2kg (1DP)

Step-by-step explanation:

0.64x680

64 divided by 100 = 0.64

4 0
3 years ago
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Mhc-cghz-fve - G MEEET C0DE<br>ANYONEEEE❤️❤️​
Lena [83]

Answer:

What is it about

now girls are also starting to post questions like these

I thought only boys did

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2 years ago
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(1 point) Newton's law of cooling states that the temperature of an object changes at a rate proportional to the difference betw
slavikrds [6]

Answer:

a. \frac{dT}{dt}=k(T-Tm); T(0)=190

b. C_{0}=122

c. k=-0.00259

d. t=153.39838\\ minutos

Step-by-step explanation:

a. Newton's law of cooling states that the speed with which a body is cooled is proportional to the difference between its temperature and that of the medium in which it is found. Then, the initial value problem is given by:

Tm=68

\frac{dT}{dt}=k(T-Tm); T(0)=190

b. The differential equation obtained is a differential equation of separable variables:

\frac{dT}{T-Tm}=kdt\\\\\int {\frac{dT}{T-Tm}}=\int{kdt}\\\\Ln|T-Tm|=kt+C\\\\T(t)=C_{0}e^{kt}+Tm=C_{0}e^{kt}+68\\\\T(0)=C_{0}e^{k(0)}+68=190\\\\C_{0}=122

c. After 33 minutes of serving the coffee has cooled to 180°:

T(33)=122e^{33k}+68=180\\\\e^{33k}=\frac{112}{122}\\\\33k=Ln(\frac{112}{122})\\\\k=-0.00259

d.

150=122e^{-0.00259t}+68\\\\Ln(\frac{150-68}{122})=-0.00259t\\\\t=153.39838\\\\

8 0
3 years ago
What is the exact area of a circle with a diameter of 64 m?
torisob [31]
The answer would be 45
5 0
3 years ago
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Which math function describes the following situation?
MissTica
This is the concept of inequality;
We are told that the distance a car travels depends on how full gas tank is, this means that the car will travel until the point when gasoline is finished. Thus,
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f(x)=distance(gasoline)<89

thus the correct answer will be:

B] Distance (amount of gasoline) <  89

4 0
3 years ago
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