Solve the following equation for x. Write answer with one decimal place. 64.7 / X = 29 / 49.7

There are 6.022 x 10^23 atoms of hg in 1 mole of hg. the number of atoms in 4.5 moles of hg can be found by multiplying 4.5 by 6.022 x 10^23 a. 2.7 x 10^24 b. 27 x 10^23 c. 2.71 x10^24 d. 27.099 x 10^23

Can someone me with these questions plz.

The variability in marine salinity between habitats does not impact the fish living there. select the best answer from the choices provided t f