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4 years ago

Write the decimal equivalent for each rational number. Use a bar over any repeating digits. 2/3 , 3/11 and 8 4/9

Mathematics

1 answer:

kkurt [141]4 years ago

6 0

2/3 = 0.6666666...... (I dont know how to put a bar above the 6)

3/11 = 0.27 (with a bar above the 27

8.4 (with a bar above the 4)

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3 years ago

Find the uncertainty in a calculated average speed from the measurements of distance and time. Average speed depends on distance

zzz [600]

Answer:

$\frac{\Delta v}{v}=0.426$

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you have that the average sped is given by the following formula:

$v(x,t)=\frac{x}{t}$

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$\frac{\Delta v}{v}=\sqrt{(\frac{\Delta x}{x})^2+(\frac{\Delta t}{t})^2}$ (1)

Δv: uncertainty in speed

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Δt: uncertainty in time = 0.7s

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t: time = 1.7s

You replace the values of all parameters in the equation (1):

$\frac{\Delta v}{v}=\sqrt{(\frac{0.9}{8.1})^2+(\frac{0.7}{1.7})^2}\\\\\frac{\Delta v}{v}=0.426$

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3 years ago