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3 years ago

Which graph represents this equation? Equation: y = 2/3x^2 - 6x

Mathematics

2 answers:

vovangra [49]3 years ago

7 0

Answer:

I'm afraid that none of them are, as the x-intercepts of the equation are 0 and 9 respectively

however, D. is the closest to it, and it would be the correct graph if there were parentheses around $x^{2}-6x$

Step-by-step explanation:

tatuchka [14]3 years ago

5 0

Answer:

Step-by-step explanation:

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According to newton law of cooling

$\dfrac{d T}{dt} = k (T - T_a)$

and

$T = Ce^{kt} + T_a$

now At Ta = 100

T₀ = 10 °C

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$k = ln{\dfrac{88}{90}}$

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hence, after 48.88 s the temperature of the body will be 70°C

b) time taken to reach 98°C

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$(\dfrac{88}{90})^t = \dfrac{1}{45}$

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t = 390 s

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2 years ago