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Svet_ta [14]
4 years ago
14

7. Find the volume of a substance whose density is 4 g/mL and mass is 4.1g.

Mathematics
1 answer:
sdas [7]4 years ago
4 0
Use the equation d=m/v and rearrange it to be v=d*v
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Let S1= 1, S2=2+3, S3= 4+5+6<br> Find S7<br> Find S17<br> Find Sn
Natali [406]

Answer:

  • S7 = 175
  • S17 = 2465
  • Sn = 1/2(n³ +n)

Step-by-step explanation:

The progression of sums is ...

  1, 5, 15, 34, 65, ...

So, first differences are ...

  4, 10, 19, 31

Second differences are ...

  6, 9, 12, ...

Third differences are constant:

  3, 3, ...

This means the expression for Sn will be a cubic expression. If dn is the first of the n-th differences, then the equation can be written as ...

  Sn = S1 +(n -1)(d1 +(n -2)/2(d2 +(n -3)/3(d3)))

And this simplifies a little bit to ...

  Sn = 1 +(n -1)(4 +(n -2)(n +3)/2)

In simpler form, we have ...

  Sn = 1/2(n³ +n)

Then the two terms we're interested in are ...

  S7 = (1/2)(7³ +7) = 175

  S17 = (1/2)(17³ +17) = 2465

3 0
3 years ago
Read 2 more answers
What is the least common multiple of 27,48, and 66
iragen [17]
Hello, there! 

The LCM would most likely be: 4.752

So, go through all of your factors to find your answer of those numbers

MeIsKaitlyn:)

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4 0
3 years ago
Helppppppp!!!! Pleaseeee
Sergeeva-Olga [200]

Answer:

2.9×

{10}^{8}

5 0
2 years ago
Help!! I WILL GIVE BRAINLIEST I NEED HELPPPPPPPPPPPPPPPPPPP PLEASE PLEASE PLEASE PLEASEEEEEEEEEEEEE IM DEADD I REALLY NEED HELP
Juliette [100K]

Answer:

arc axb=4.938

Step-by-step explanation:

to find the  measure of arc AXB find angle P first

length of the arc=rФ

in triangle APQ sin angle APQ= opp/hyp=AQ(radius)/PQ=5/√5+√21

in traingle PQB sin angle BPQ= opp/hyp.=5/√5+√21

angle P"

2arcsin 5/√5+√21= 94.324 degrees=(π*94.324)/180=1.64626 rad.

arc AXB=Фr (Ф=94.324 , r=3)

arc axb=4.938

7 0
3 years ago
True or false. the function is the product of 400 and a factor that does not depend on the initial number of visitors
Aleks [24]

Answer:

true

Step-by-step explanation:

8 0
3 years ago
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