Which statement is true concerning the planets’ orbits?

all planetary orbits are identical in size.
all planets revolve around the sun at the same speed.
all planetary orbits are elliptical.
some planetary orbits are irregular in shape.

Blank is a naturally occurring gas that's found in most soils and rocks and can cause lung cancer

What statistics are to determine the development of a nation?

Drag and drop a statement or reason to each box to complete the proof. statement reason △abc , de⎯⎯⎯⎯⎯∥ac⎯⎯⎯⎯⎯ given corresponding angles postulate △bde∼△bac babd=bcbe polygon similarity postulate ba=bd+dabc=be+ec bd+dabd=be+ecbe substitution property of equality bdbd+dabd=bebe+ecbe addition of fractions 1+dabd=1+ecbe simplify. dabd=ecbe subtraction property of equality