660 divided by 2 and it gives you your answer of 13.2
So therefore the answer is 13.2 per hour
I think it’s D or a I think so
Answer:


Step-by-step explanation:
Connecting points O and E and points O and J, we get triangle EOJ. This triangle is equilateral triangle, because OJ=OE=JE=r=10 cm.
Since EP⊥IJ, then segment JP is the height of the triangle EOJ.
The height of the equilateral triangle can be found using formula

where a is the side length.
So,

Therefore JP is 5√3 cm
Both of them are the first answer choice