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IRISSAK [1]
3 years ago
13

In 1992, the average electric bill for a single

Mathematics
1 answer:
Aleksandr [31]3 years ago
6 0

Answer:

Price went up, $24.64/year for 28 years

Step-by-step explanation:

Change Year = 28

Change Price = 690

Average rate = 690/28 = 24.64

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Help please<br> The area is approximately ___ square units.<br><br> Use 3.14 for π.
velikii [3]

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757

Step-by-step explanation:

im not very sure,, hope.it helped :)

5 0
3 years ago
80 is ⅒ of ____. <br><br><br><br><br> HELP ME
Snowcat [4.5K]

Answer:

800

Step-by-step explanation:

If you multiply 1 tenth by 80 you will get 800 over 1.

800/1

800/1 = 800.

8 0
3 years ago
17 1/4 over 100 as a decimal
Andrew [12]

Answer:

0.1725

Step-by-step explanation:

17 1/4 /100

17.25/100

0.1725

4 0
2 years ago
Read 2 more answers
A roast turkey is taken from an oven when its temperature has reached 185 degrees F and is placed on a table in a room where the
Vedmedyk [2.9K]
(a) Using Newton's Law of Cooling, \dfrac{dT}{dt} = k(T - T_s), we have \dfrac{dT}{dt} = k(T - 75) where T is temperature after T minutes.
Separate by dividing both sides by T - 75 to get \dfrac{dT}{T - 75} = k dt. Integrate both sides to get \ln|T - 75| = kt + C.

Since T(0) = 185, we solve for C:
|185 - 75| = k(0) + C\ \Rightarrow\ C = \ln 110
So we get \ln|T - 75| = kt + \ln 110. Use T(30) = 150 to solve for k:
\ln| 150 - 75 | = 30k + \ln 110\ \Rightarrow\ \ln 75 - \ln 110= 30k \Rightarrow \\ k= \frac{1}{30}\ln (75/110) = \frac{1}{30}\ln(15/22)

So

\ln|T - 75| = kt + \ln 110 \Rightarrow |T - 75| = e^{kt + \ln110} \Rightarrow \\ \\&#10;|T - 75| = 110e^{kt} \Rightarrow T - 75 = \pm110e^{(1/30)\ln(15/22)t}  \Rightarrow \\&#10;T = 75 \pm110e^{(1/30)\ln(15/22)t}

But choose Positive because T > 75. Temp of turkey can't go under.

T(t) = 75 + 110e^{(1/30)\ln(15/22)t} \\&#10;T(45) = 75 + 110e^{(1/30)\ln(15/22)(45)}  = 136.929 \approx 137{}^{\circ}F

(b)

T(t) = 75 + 110e^{(1/30)\ln(15/22)t} = 75 + 110(15/22)^{t/30}  \\&#10;100 = 75 + 110(15/22)^{t/30}   \\&#10;25 = 110(15/22)^{t/30}  &#10;\frac{25}{110} = (15/22)^{t/30}   \\&#10;\ln(25/110) / ln(15/22) = t/30 \\&#10;t = 30\ln(25/110) / ln(15/22)  \approx 116\ \mathrm{min}

Dogs of the AMS.
4 0
3 years ago
Hey i need help! Its due soon
Leto [7]

Answer:

Step-by-step explanation:

2222.88-1690.36=nope

hope this helps!

7 0
3 years ago
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