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alina1380 [7]
3 years ago
7

Why can you use fraction multiplication to check the

Mathematics
1 answer:
LUCKY_DIMON [66]3 years ago
4 0

Answer:

Division and multiplication are inverse operations. This means they "undo" each other. You can check your answer by multiplying the quotient by the divisor. You should get the dividend.

have a great day :)

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Which is bigger 4/7 or 3/5
romanna [79]
3/5 is bigger because 4/7 = 20/35 and 3/5 = 21/35
8 0
3 years ago
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Atmospheric pressure decreases by about 11.8% for every 1000 meters you climb. The pressure at sea level is 1013 millibars (a un
erica [24]
At sea level, the pressure is 1013, that's when the altitude is at 0, sea level, let's see

\bf \textit{Periodic Exponential Decay}\\\\
A=I(1 - r)^{\frac{t}{p}}\qquad 
\begin{cases}
A=\textit{accumulated amount}\to &1013\\
I=\textit{initial amount}\\
r=rate\to 11.8\%\to \frac{11.8}{100}\to &0.118\\
t=\textit{meters climbed}\to &0\\
p=period\to &1000
\end{cases}
\\\\\\
1013=I(1-0.118)^{\frac{0}{1000}}\implies 1013=I\cdot 1\implies 1013=I

so, the inital amount is 1013, when t = 0,

\bf \textit{Periodic Exponential Decay}\\\\
A=I(1- r)^{\frac{t}{p}}\qquad 
\begin{cases}
A=\textit{accumulated amount}\\
I=\textit{initial amount}\to &1013\\
r=rate\to 11.8\%\to \frac{11.8}{100}\to &0.118\\
t=\textit{meters climbed}\to &t\\
p=period\to &1000
\end{cases}
\\\\\\
A=1013(1-0.118)^{\frac{t}{1000}}\implies A=1013(0.882)^{\frac{t}{1000}}

now, to check the atmospheric pressure at 4000, simply set t = 4000, to get A.


7 0
3 years ago
The temperature at​ 8:20 P.M. is 3degreesC. If it has dropped 1degreesC per​ minute, what was the temperature at 7 : 50 ​P.M.?
kotykmax [81]

Answer:

33°C

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The time between 8:20 and 7:50 is 30 minutes. If it drops 1°C per minute you multiply this number by the amount of minutes which would be 30. This becomes 30°C. Then add the 3° it's at now to become 33°C.

3 0
3 years ago
Okkkk last one pls pls help
sweet-ann [11.9K]
360 - 2(65) = 230
A = C = 230/2 = 115

m<y = 360 - 115 = 245

answer: m<y = 245
8 0
3 years ago
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What is the difference between vocal music and instrumental music?​
Alexandra [31]

Answer:

Vocal music is music that uses and emphasizes the human voice. ... Vocal music is the opposite of instrumental music, which uses any combination of instruments, such as strings, woodwinds, brass, or percussion, usually without the human voice

4 0
3 years ago
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