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tiffanibell71
04.02.2020 •
Mathematics
The product of 2 times x and the sum of 9 and 5 times the square of x
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Ответ:
Step-by-step explanation:
2 times x will be represented by 2x.
5 times the square of x will be represented by 5x².
Sum of 9 and 5 times square of x will be written as (9 + 5x²).
Now we compile the sentence, product of 2 times x and the sum of 9 and 5 times the square of x will be written as
Answer will be![2x\times (9+5x^{2} )](/tpl/images/0500/3881/01598.png)
Ответ:
a.![\frac{dT}{dt}=k(T-Tm); T(0)=190](/tpl/images/0247/2148/4d109.png)
b.![C_{0}=122](/tpl/images/0247/2148/02ce1.png)
c.![k=-0.00259](/tpl/images/0247/2148/a5a72.png)
d.
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:
b. The differential equation obtained is a differential equation of separable variables:
c. After 33 minutes of serving the coffee has cooled to 180°:
d.