Rose Chang
04/26/2024 · Senior High School
Ronaldo kastar en boll upp i luften. Höjden ovanför marken efter \( x \) sekunder är \( f(x)=2+4 x-4,9 x^{2} \) meter. Hur lâng tid tar det innan bollen träffar marken? Avrunda svaret till närmaste tiondel sekund.
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Det tar ungefär 1.2 sekunder innan bollen träffar marken.
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