3 years ago

You score an 80% on your test. You answer 44 questions correctly. How many questions were on the test?

Mathematics

1 answer:

Elanso [62]3 years ago

8 0

I think 55 would be the right answer

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Evaluate s(t)=∫t−[infinity]||r′(u)||du for the bernoulli spiral r(t)=⟨etcos(8t),etsin(8t)⟩. It is convenient to take −[infinity]

sveta [45]

$\vec r(t)=\langle e^t\cos8t,e^t\sin8t\rangle$

$\|\vec r'(t)\|=\sqrt{(e^t(\cos8t-8\sin8t))^2+(e^t(\sin8t+8\cos8t))^2}=e^t\sqrt{(\cos8t-8\sin8t)^2+(\sin8t+8\cos8t)^2}$

$\implies\|\vec r'(t)\|=e^t\sqrt{65}$

Then

$s(t)=\displaystyle\sqrt{65}\int_{-\infty}^te^u\,\mathrm du=\sqrt{65}e^t$

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3 years ago

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skad [1K]

C) -2 and 4 because it crosses over the x - axis

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2 years ago

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Arada [10]

To find the distance, you need to subtract the second point from the first one. So:

0 - (-9) = 9 ( two minuses turn into a positive)

And

7 - (-5) = 12

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~Luna

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3 years ago

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The equation of the line in the graph is y= (blank) x+ (blank)

VashaNatasha [74]

Y= -1x + -1 is the answer

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3 years ago

Quanto é o resultado e como ae resolve a seguinte operação: 1.205 × 32 Me ajudem preciso para hj.

Elenna [48]

Answer:

la respuesta es 38560