3 years ago

A machine worked for 5 hours and used 4 kilowatts of electricity . The machine used Of a kilowatt each hour it worked.

Mathematics

1 answer:

Blababa [14]3 years ago

6 0

You do 4\5 and the answer should come up to be 0.8

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Find the coordinates of the point on a circle with radius 4 at an angle of 2pi/3

dmitriy555 [2]

Answer:

The coordinates of the point on a circle with radius 4 at an angle of $\frac{2\pi}{3}$ radians are x = -2 and y = 3.464.

Step-by-step explanation:

This problem ask us to determine the rectangular coordinates from polar coordinates. The polar coordinates of the point in rectangular form is expressed by the following expression:

$(x,y) = (r\cdot \cos \theta, r\cdot \sin \theta)$

Where $r$ and $\theta$ are the radius of the circle and the angle of inclination of the point with respect to horizontal, measured in radians. If $r = 4$ and $\theta = \frac{2\pi}{3}\,rad$ , the coordinates of the point are: