EXERCICE 1 Un automobiliste effectue un trajet en roulant à 90 km/h. Voici son tableau de marche : Distance parcourue (km) 90 180 270 360 450

Durée écoulée (h) 1 2 3 4 5

a. Ce tableau décrit-il une situation de proportionnalité ?

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step-by-step explanation:

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the figures below are made out of circles, semicircles, quarter … find the area and the perimeter of each figure and give your answers as a completely simplified exact value in terms of π (no approximations). remember that we'll also have to cut whatever areas we get in half, since we're only dealing

step-by-step explanation:

56.6

step-by-step explanation:

the ratio of the perimeters is equal to the scale.

the ratio of the areas is equal to the square of the scale.

34 / 20 = k

a / 19.6 = k²

substituting:

a / 19.6 = (34 / 20)²

a = 19.6 (34 / 20)²

a ≈ 56.6

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step-by-step explanation:

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