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AnnyKZ [126]
4 years ago
8

Pls explain the easiest way you an this will help me Thanks XD

Mathematics
1 answer:
Ostrovityanka [42]4 years ago
7 0
The ratio is 4:3:1
let the ratio be 4x:3x:x
according to the question,4x+3x+x=40
8x=40
x=5
therefore amount of gravel=x*4=5*4=20m^{3}
amount of sand=5*3=15m^{3}
amount of cement=5*1=5m^{3}
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keith spent 60% of jis birthday money at the mall. If he spent $24 at the mall, how much money did Keith receive for his birthda
rodikova [14]
24 x 100 = 2400

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Keith got $40 for his birthday.
8 0
3 years ago
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Many people think that a national lobby's successful fight against gun control legislation is reflecting the will of a minority
Ierofanga [76]

Answer:

At least 653 citizens need to be sampled.

Step-by-step explanation:

The following formula is used to compute the minimum sample size required to estimate the true proportion who are in favor of gun control legislation  within 5% margin of error:

n≥ p×(1-p) × (\frac{z}{ME} )^2 where

  • n is the sample size
  • p is the sample proportion of people who are in favor of gun control legislation (\frac{2250}{4000}=0.5625
  • z is the corresponding z-score for 99% confidence level (2.575)
  • ME is the margin of error in the estimation (5% or 0.05)

Putting numbers in the formula

n≥ 0.5625×0.4375 × (\frac{2.58}{0.05} )^2 ≈652.7

n needs to be<em> at least 653</em> to provide this equation.

4 0
3 years ago
How many pounds are in 6 tons, 200 pounds
asambeis [7]

Answer:

there are 12000 pounds in 6 tons

5 0
3 years ago
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How many hours are in 6,489 minutes
Semenov [28]

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108 hours and 15 minutes

Step-by-step explanation:

4 0
2 years ago
Solve for the missing variable<br><br> X - 9 = 50<br><br> 10x = 80
Luda [366]

Answer

x=50+9

x=59

x=80/10

x=8

Step-by-step explanation:

Hope this helps u...

7 0
4 years ago
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