Mathematics: Cana buys candy for her birthday party at a supermarket where there is no sales tax. She buys lollipops that cost $0.49 each and gummies that are sold by the pound. In total, Cana paid $9.73 for 16 lollipops and 4.2 pounds of gummies. What is the cost per pound of the gummies? A: $4.50 B: $2.20 C: $0.90 D: $0.45

Cana buys candy for her birthday party at a supermarket

Ответ:

angieplasencia8

19.08.2020

Mathematics

$0.45

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rodrickahammonds

25.05.2021

Mathematics

$\bf y=t\left[ ln(7t) \right]^2\impliedby \textit{product rule}\\\\
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\cfrac{dy}{dt}=1\cdot \left[ ln(7t) \right]^2+t\cdot 2\left[ ln(7t) \right]\cdot \left( \cfrac{7}{7t} \right)\cdot 7\impliedby chain-rule
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\cfrac{dy}{dt}=\left[ ln(7t) \right]^2+ln(7t)\cdot 2t\cdot \cfrac{1}{t}\cdot 7\implies \cfrac{dy}{dt}=\left[ ln(7t) \right]^2+14ln(7t)$

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