I need help on this question please and explanation

RED 453.73km

Step-by-step explanation:

So what I'm going to do is find the area of it as if it was a full circle then cut it in half.

So the formula to find the area of a circle is A =

So to find r (radius) cut the diameter in half. 34/2 = 17

Plug in

A =

A = 907.46

Now cut it in half

453.73km would be the answer

HOPE THIS HELPS YA!!!

453.73 (the last option, in red)

Step-by-step explanation:

The formula for finding the area of a semi circle is half the formula for finding the area of a whole circle ( since semi is half a circle). The formula is:

where r is the radius.

Since the diameter is given, we have to first find the radius of the circle.

Radius = half of diameter =

Radius = = 17km

Now we can find the area of the semi circle.

The value of pi is taken as 3.14

 (The dot between the 3.14 and shows that you have to multiply both of them)

=

=

Area of the semi circle = 453.73

answer: 1, 3 and 5 are correct

step-by-step explanation:

b.my answer is b.

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