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John ran a race at his school. The course was measured at 450m correct to 2sf and his time was given at 62 econds to the nearest second. Calculate the difference between his maximum and minimum possible average speed. Round you answer to 3sf.

Upper bound for distance: 455mLower bound for distance: 445mUpper bound for time: 62.5sLower bound for time: 61.5sSpeed = Distance/timeMaximum possible average speed would be the longest distance divided by ...
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Answered by Gideon E. • Maths tutor
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The perimeter of a right angled triangle is 105cm. The lengths of its sides are in the ratio of 2:6:7. Work out the area of the triangle.

Add up ratios: 2+6+7=15Divide perimeter by ratio total, to figure out how big the scale of the triangle is: 105/15=7Multiply each separate figure in the ratio by the scale factor (7): 2x7 : 6x7 : 7x714 : 42 ...
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Answered by Megan H. • Maths tutor
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Name two features of a plant cell that are not found in animal cells

Chloroplasts, Vacuole filled with sap
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Answered by Ruby O. • Biology tutor
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Describe and Explain the trend in Volatility of Group 7 Elements

The group 7 elements become less volatile as you go down the group. This is because as you go down the group the molecules become larger and contain more electrons. Therefore there are Greater London forces ...
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Answered by Ruby O. • Chemistry tutor
21050 Views

What problems did the Weimar government face in 1919-19223?

From the onset of it’s creation, the Weimar Republic already suffered from a host of problems. The very admittance of a Republic angered a lot of Germans who were still loyal to the the previous rule of the ...
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