If mars is located an average of 228 million km from earth, and radio waves travel at 300,000 km/s, how many minutes does it take a communication to reach earth from mars ?

It depends

Explanation:

Earth and Mars are constantly moving and rotating around the sun, as such the distance between them changes dramatically throughout the year. At their closest points signals only take a little more than 4 minutes to travel between the two planets, but it can sometimes take as long as twenty minutes.

he uptake of drugs from the intestine is often strongly influenced by diffusion. for example, consider a water-insoluble steroid for treating inflammation that is solubilized in aggregates of detergent molecules, called micelles. these micelles, aggregates of 80 soap molecules, have a molecular weight of 24,000, a diameter of 2.6 nm, and a charge of -27. the positively charge ions (counterions) in this system are na".

it would be b. 6co2 + 6h2o --> c6h12o6 + 6o2