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4 years ago

A machine worked for 5 hours and used 4 kilowats if electricity. The machine used ------ of a kilowatt each hour it worked.

Mathematics

1 answer:

slega [8]4 years ago

8 0

Answer:

0.8 kilowatt/hour

Step-by-step explanation:

divide 4/5, gives you .

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What exponents can you use to get to 625

olya-2409 [2.1K]

25^2 Hope that helps

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3 years ago

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Hamzah's soccer team is trying to raise $620 to travel to a tournament in Florida, so they decided to host a pancake breakfast.

Kobotan [32]

Answer:

31 people

Step-by-step explanation:

Hamzah soccer team is trying to raise the amount of $620 to travel to a tournament in Florida

The soccer team decide to organise a pancake breakfast

Each person that attends the breakfast must pay $20

Therefore the amount of people needed to attend the breakfast to raise $620 can be calculated as follows

= 620/20

= 31

Hence 31 people need to be in attendance inorder to raise $620

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3 years ago

Name the marked angle in 2 different ways.

Leona [35]

Answer:

Step-by-step explanation:

<CDE or <EDC

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3 years ago

Find the complex fourth roots \[-\sqrt{3}+\iota \] in polar form.

____ [38]

Let $z=-\sqrt3+i$ . Then

$|z|=\sqrt{(-\sqrt3)^2+1^2}=2$

$z$ lies in the second quadrant, so

$\arg z=\pi+\tan^{-1}\left(-\dfrac1{\sqrt3}\right)=\dfrac{5\pi}6$

So we have

$z=2e^{i5\pi/6}$

and the fourth roots of $z$ are

$2^{1/4}e^{i(5\pi/6+k\pi)/4}$

where $k\in\{0,1,2,3\}$ . In particular, they are

$2^{1/4}e^{i(5\pi/6)/4}=2^{1/4}e^{i5\pi/24}$

$2^{1/4}e^{i(5\pi/6+2\pi)/4}=2^{1/4}e^{i17\pi/24}$

$2^{1/4}e^{i(5\pi/6+4\pi)/4}=2^{1/4}e^{i29\pi/24}$

$2^{1/4}e^{i(5\pi/6+6\pi)/4}=2^{1/4}e^{i41\pi/24}$

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3 years ago

WILL MARK BRAINLEIST!!!!! HELP ASAP!

Alex Ar [27]

Answer:

1 7/5

Step-by-step explanation:

we should first simplify the fraction part of each option

7/5 = 1 2.5 add this to 1 and you get 2 2/5

this happens to be the answer but in the future go through each option

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3 years ago

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