## Welcome to H3 Maths

Blog Support for Growing Mathematicians

## Posts tagged with 100m

### 100m Graph

August6

Bolt triumphs again in the 100m Olympic sprint, clocking an Olympic record 9.63s, – 0.05s outside his world record. Below is a graph of the 100m with extrapolation of expected times in the future. Click here for more analysis of the 100m. Activity: how fast was Bolt’s 100m in kms/hr or miles/hr? Answer in the Post Support […]

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### Has Maths calculated the top speed for 100m?

August5

Mathematician Reza Noubary recently calculated that “the ultimate time for [the] 100 meter dash is 9.44 seconds. But is he right? Read more of this BBC article here.

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### Evolution of the 100m Dash

July30

Click here to watch the evolution of winning times for the 100m:

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#### Post Support

The graph on the left (Coronavirus) is for a time period of 30 days, while the one on the right (SARS) is for 8 months! Very poor graphical comparison and hardly relevant, unless it is attempting to downplay the seriousness of the coronavirus?

10 x 9 x 8 + (7 + 6) x 5 x 4 x (3 + 2) x 1 = 2020

NCEA Level 2 Algebra Problem. Using the information given, the shaded area = 9, that is:
y(y-8) = 9 –> y.y – 8y – 9 =0
–> (y-9)(y+1) = 0, therefore y = 9 (can’t have a distance of – 1 for the other solution for y)
Using the top and bottom of the rectangle,
x = (y-8)(y+2) = (9-8)(9+2) = 11
but, the left side = (x-4) = 11-4 = 7, but rhs = y+? = 9+?, which is greater than the value of the opp. side??
[I think that the left had side was a mistake and should have read (x+4)?]