Find the solution of - 6 1/2 x 1/2 in distributive form

Two parallel lines are crossed by a transversal.what is value of x

The size of a certain cell is 2.5*10^-9m. another cell is 1.5*10^3 times larger. how large is the larger cell in scientific notation?

Atorch and a battery cost 2.50 altogether.the torch costs 1.50 more than the battery.what fraction of the total price is the torch? give your answer in its simplest form.