For 7 days keep track of the number of pieces of mail you receive at your home.

Mathematics

2 answers:

Sav [38]3 years ago

7 0

Answer:

Step-by-step explanation:

the Answer is B: Z

torisob [31]3 years ago

3 0

The pattern is that everyday you get 4 more. In other words, everyday you increase by 4.
Example: 0-4, and 5-9, you can see that you add 4 more to get from 0 to 4 or add 4 more to get from 5 to 9

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The function {(1, 4), (2, 5), (3, 6)} has the function rule y = 3x + 1.

inna [77]

False.
y= 3(1)+1= 4
y= 3(2)+1=7 not 5
y= 3(3)+1=10 not 6

4 0

3 years ago

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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

I need help on this

Marina CMI [18]

I think it's answer choice a

3 0

3 years ago

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A tree 24 feet tall casts a shadow 12 feet long. Brad is 6 feet tall. how tall is Brad's shadow?

Tomtit [17]

24/12=6/x
24x=72
x= 3 feet

5 0