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3 years ago

Please help! I need help!

Mathematics

2 answers:

Feliz [49]3 years ago

7 0

Answer:

X is well i do not know but for the other person it says 3 times x = 8/2

Step-by-step explanation:

Molodets [167]3 years ago

6 0

Answer:

What grade work is it? I don't really know what it says. Sorry, please can you type it out?

Step-by-step explanation:

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Using Newton's Law of Cooling. You are a medical examiner called to an abandoned house in which a dead body has been discovered.

Artyom0805 [142]

A) The differential equation comes from the fact that the rate of temperature change is proportional to the difference in temperatures.
$\frac{dT}{dt} = \alpha(T -52)$

B) Find general solution by separating variables and integrating $\int\frac{dT}{T-52} = \alpha \int dt \\ ln (T-52) = \alpha t + C \\ T = C e^{\alpha t} +52$ :

C) Initial condition is t=0, T = 87
$87 = C +52 \\ C = 35$

D) Total time elapsed is 10 minutes, new temperature is 84
$84 = 35 e^{10\alpha} +52$
solve for alpha
$e^{10\alpha} =\frac{32}{35} \\ \alpha = \frac{ln(32/35)}{10} \\ \alpha = -.00896$

E) Temperature function is:
$T = 35 e^{-.00896 t} +52$
solving for t
$t = \frac{ln (\frac{T-52}{35})}{-.00896}$
Plug in T = 98.6
$t = -31.95$

This is approximately 32 minutes before he arrived or about 1:20 AM

3 0

3 years ago

Find the constant of proportionality and unit rate for the data in the table. Then write the equation to represent the relations

Hatshy [7]

You should set up an X and Y table. Make time X and Distance Y. (the table is like a cross: on the left top put x and left top put y. Then under the line list the x and y numbers given in order.) Then find the "slope" which is y/x (rise over run) then you get the increase rate of 45 mph. The relation between them would be D=45t

3 0

3 years ago

Find the slope of the line that passes through the points (4, 3) and<br> (2, 7).

timofeeve [1]

Answer:

-2

Step-by-step explanation:

7-3/2-4=-2

use slope formula

5 0

3 years ago

The first three terms in a pattern are shown in the image below. How many circles would be in the 5th term?

Alex Ar [27]

Answer:

Step-by-step explanation:

the pattern is like this

start with 1 then add 2 equals 3

start with 3 then add 3 equals 6

so 6 add 4 equals to 10

and the 5th term will be 10 add 5

equals to 15

4 0

3 years ago

Solve for t.

Drupady [299]

C .............................

7 0

3 years ago