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tekilochka [14]
2 years ago
5

Mick has a 6-digit code. He remembers it as three 2-digit numbers. The first number is between 10 and 20. The second number is 3

times the first number. The third number is 5 times the first number. All six digits are different. Work out the code​
Mathematics
1 answer:
Jlenok [28]2 years ago
3 0

Answer:

I think its 185490

Step-by-step explanation:

18×3=54 18×5=90 all different digits between 10-20

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What would be the volume of (a) air (b) plastic in a ball with 25cm diameter made from plastic 2mm thick?
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Answer:

Part a) The volume of the air is V=7,794.78\ cm^{3}

Part b) The volume of the plastic is V=386.45\ cm^{3}

Step-by-step explanation:

we know that

The volume of the sphere is equal to

V=\frac{4}{3}\pi r^{3}

step 1

Find the volume of the complete ball (air +plastic)

we have

r=25/2=12.5\ cm ------> the radius is half the diameter

substitute

V=\frac{4}{3}\pi (12.5)^{3}

V=8,181.23\ cm^{3}

step 2

Find the volume of the air

we have that

The plastic is 2 mm thick

Convert to cm

2 mm=2/10=0.2 cm

so

The radius of the interior of the ball is

r=12.5-0.2=12.3\ cm

substitute

V=\frac{4}{3}\pi (12.3)^{3}

V=7,794.78\ cm^{3} -----> this is the volume of the air (interior of the ball)

step 3

Find the volume of the plastic

we know that

The volume of the plastic is equal to the volume of the complete ball minus the volume of the air

so

8,181.23\ cm^{3}-7,794.78\ cm^{3}=386.45\ cm^{3}

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Answer:

Equation simplifed= 8x^2-14x-15

Step-by-step explanation:

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Answer:

\text{Null hypothesis}: H_0:\mu=90\\\\\text{Alternative Hypothesis}:\mu\neq 90

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Given claim : From the time shoots are planted 90 days on average are required to obtain the first berry.

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\text{Null hypothesis}: H_0:\mu=90\\\\\text{Alternative Hypothesis}:\mu\neq 90

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