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Natalka [10]
3 years ago
5

In tilton school there are 380 students in key stage 3 240 students in key stage 4 110 students in key stage 5 phoebe is carryin

g out a survey. she needs a sample of 100 students
Mathematics
1 answer:
never [62]3 years ago
8 0

Answer:

52

Step-by-step explanation:

Total Number of students :

Stage 3 : 380

Stage 4 : 240

Stage 5 : 110

Total = (380 + 240 + 110) = 730

Number of samples required = 100

Number of key stage 3 students required :

(Key stage 3 / total) * number of samples

(380 / 730) * 100

= 0.5205479 * 100

= 52.0547

= 52

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Answer:

volume of the tank be when the sensor turns on = 92.316 ft³

Step-by-step explanation:

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Height = h = 3 ft

Volume of a cylinder = πr²h

= 3.14 × 7² × 3

= 3.14 × 49 × 3

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The tank comes equipped with a sensor to alert the farmer to fill it up when the water falls to 20% capacity.

volume of the tank be when the sensor turns on = 20% of Volume of a cylinder

= 0.20 * 461.58 ft³

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volume of the tank be when the sensor turns on = 92.316 ft³

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Step-by-step explanation:

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3 years ago
On Monday, the high was 60oF. On Tuesday, the high was 10% more than Monday. Then on Wednesday, the temperature decrease by 8%.
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Answer:

60.72

Step-by-step explanation:

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Wednesday: temperature decreases by 8 percent

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