Should any of marjorie's family members whom she comes into contact with be considered at risk of pertussis? if so, who? a) yes, the five-year-old cousin should be considered at risk. b) yes, the aunt should be considered at risk. c) yes, the six-week-old cousin should be considered at risk. d) no, no one should be considered at risk.

C) Yes, the six-week-old cousin should be considered at risk.

Explanation:

young are at higher risk of pertussis  as compared to older children and adult because  young infants are not fully immunized. At the young age of 6 week, the cousin may not have started the DPT vaccination.  so babies at this age gets easily affected when they are in contact with the infected people.

water is a polar molecule. a chemical bond is a force of attraction between atoms or ions. bonds form when atoms share or transfer valence electrons. atoms form chemical bonds to achieve a full outer energy level, which is the most stable arrangement of electrons. so, false

explanation:

in h2o molecule, two water molecules are bonded by a hydrogen bond but the bond between two h - o bonds within a water molecule are covalent. the greater the electronegativity difference, the more ionic the bond is. bonds that are partly ionic are called polar covalent bonds. nonpolar covalent bonds, with equal sharing of the bond electrons, arise when the electronegativities of the two atoms are equal.