Help me please !!!!!

Mathematics

1 answer:

kupik [55]3 years ago

6 0

Answer: inverse functions

Step-by-step explanation:

Inverse functions are symmetrical about the y=x axis. You could dot that line in by plotting points like (-4,-4) (-3,-3) (-1,-1) (0,0) (1,1) (3,3) etc. Then since you could fold the graph on that dotted axis and the two lines match up, you know they are inverses of each other.

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Find the area of the semicircle. Round your answer to the nearest whole number, if necessary.

xxMikexx [17]

Answer:

To the nearest hundredth : 628.32 $cm^2$

To the nearest whole number : 628 $cm^2$

Step-by-step explanation:

The formula for the area of a circle is : $\pi*radius^2$

To work out the area you would first need to work out the radius. You can do this by dividing the diameter of 40 cm by 2, this gives you 20 cm. This is because the radius is half of the diameter.

Now that we have worked out the radius, the next step would be to work out the area. You can do this by multiplying pi by the radius of 20 squared, this gives you 1256.64.

The final step is to work out the area of this semi-circle. You can do this by dividing the area of 1256.64 by 2, this gives you 628.32 $cm^2$ . This is because a semi-circle is half of a circle.

1) Divide 40 by 2.

$40/2=20 cm$