Portia hikes 2/3 of a mile every 1/6 of an hour. how many miles per hour does she hike? need the answer now because it is due tomorrow!

He mass of a single atom of carbon can be found by dividing the atomic mass (12.01 g) by 6.022 x 10^23. which is the mass of a single carbon atom, correctly written in scientific notation with the correct number of significant figures?

Ineed someone to me answer my question i have to have this done and knocked out

In the diagram below,abc is congruent to dec what is the value of x