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2 years ago

3. Remember the distributive law: 2(36) = 2(30 + 6) = (2 x30) + (2 X 6) = 60 + 12 = 72 Use this law to solve: 2x(x+6 )

Mathematics

2 answers:

ch4aika [34]2 years ago

8 0

Hi !

I don't know if it's 2x × (x + 6) or 2 × (x + 6) so I'll do both of them !

2x × (x + 6)

⇔ 2x² + 12x

2 × (x + 6)

⇔ 2x + 12

Have a nice day :)

mylen [45]2 years ago

6 0

Answer:

Step-by-step explanation:

2x(x + 6)

= 2x^2 + 12x

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The number of bacteria after t hours is given by N(t)=250 e^0.15t a) Find the initial number of bacteria and the rate of growth

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$N(t)=250 e^{0.15t}\\4000=250 e^{0.15t_1}\\ \dfrac{4000}{250}= e^{0.15t_1}\\16= e^{0.15t_1}\\ \ln{16}= \ln{e^{0.15t_1}} \\ \ln{16}=0.15t_1 \\ \dfrac{\ln{16}}{0.15}=t_1=4.67\approx 5\;h$

d) $t_2=?\; (N_0→3N_0 \Longrightarrow 250 → 3\cdot250 =750)$

$N(t)=250 e^{0.15t}\\ 750=250 e^{0.15t_2} \\ \ln{3} =\ln{e^{0.15t_2}}\\ t_2=\dfrac{\ln{3}}{0.15} = 2.99 \approx 3\;h$

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3. Remember the distributive law: 2(36) = 2(30 + 6) = (2 x30) + (2 X 6) = 60 + 12 = 72 Use this law to solve: 2x(x+6 )​

3. Remember the distributive law: 2(36) = 2(30 + 6) = (2 x30) + (2 X 6) = 60 + 12 = 72 Use this law to solve: 2x(x+6 )