A pharmacist orders medications for a total of $6,439.65. A 6 1/4% discount is given if payment is made within 15 days, and a 2.5% discount is given if payment is made within 30 days. How much money can be saved by paying in 15 days instead of 30 days?

Which of the following represents a difference between viruses and viroids? a) viruses infect many types of cells, whereas viroids infect only prokaryotic cells. b) viruses have capsids composed of protein, whereas viroids have no capsids. c) viruses have genomes composed of rna, whereas viroids have genomes composed of dna. d) viruses cannot pass through plasmodesmata, whereas viroids can.