0.5 hour=30 minutes 0.75 hour=45 minutes 30*3=90 minutes 45*2=90 minutes 90+90=180 minutes Remember, there are 60 minutes in 1 hour.) 180 minutes/1 hour=3 hours So: Emma reads for 3 hours each week.
Carrier proteins move materials from one side of the cell membrane to the other. This is useful for both active transport, meaning you have to transport against the concentration gradient, and facilitated diffusion, a form of passive transport.
