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Kitty [74]
3 years ago
8

Which word phrase can be used to represent the algebraic expression 4(21+n)

Mathematics
1 answer:
m_a_m_a [10]3 years ago
4 0
Four times a number plus twenty one
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If john can cover 360 miles in 3 hours find the number of feet per minute john can cover
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Answer:

Result: 95040 foot/minute = 1080 mile/hour, so the answer is 95040

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What is the ratio of the intensities of an earthquake PP wave passing through the Earth and detected at two points 19 kmkm and 4
Tamiku [17]

Answer:

The ratio of the intensities is roughly 6:1.  

Step-by-step explanation:

The intensity I() of an earthquake wave is given by:

I = \frac{P}{4\pi d^{2}}

<em>where P: is the power ans d: is the distance. </em>

Hence, the ratio of the intensities of an earthquake wave passing through the Earth and detected at two points 19 km and 46 km from the source is:

\frac{I_{1}}{I_{2}} = \frac{P/4\pi d_{1}^{2}}{P/4\pi d_{2}^{2}}

<em>where I₁ = P/4πd₁², d₁=19 km, I₁ = P/4πd₂² and d₂=46 km     </em>

\frac{I_{1}}{I_{2}} = \frac{d_{2}^{2}}{d_{1}^{2}}

\frac{I_{1}}{I_{2}} = \frac{46 km^{2}}{19 km^{2}}

\frac{I_{1}}{I_{2}} = 5.9:1

Therefore, the ratio of the intensities is roughly 6:1.  

 

I hope it helps you!    

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3 years ago
1/8 of Tony's books are mystery books he has three mystery books how many books does Tony have an all
seropon [69]
1/8 of all=mystery
mystery=3

'of' means multiply
therefor
1/8 times all=3
multiply both sides by 8/1 to clear fracion
all=24


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