Which of the following identifies the biggest challenge STEM professionals face with an aging population? understanding the global effect of elderly populations
keeping health care costs down for elderly populations
meeting needs of both elderly and younger generations
changing requirements for technology to extend quality of life

[120 total points] (public health) in one of the largest human experiments ever conducted, in 1954 a randomized controlled trial was run to see whether a vaccine developed by a doctor named jonas salk was effective in preventing paralytic polio. a total of 401,974 children (ages 6–9), chosen to be representative of those who might be susceptible to the disease, were randomized to two groups: 200,745 children (the control group c) were injected with a harmless saline solution (a placebo) and the other 201,229 children (the treatment group t) were injected with salk’s vaccine.what was the point of giving saline solution to the children who didn’t get the vaccine? explain briefly.

90 points! during the middle ages, when people could not care for family members in the comfort of their homes, the ill were a.allowed to die b.sent to early versions of hospitals maintained by nuns and monks c.given very potent medicine, then allowed to recover in a barn or work area d.none of the above

Which learning theory is based on associative learning? a. cognitivism b. constructivism c. behaviorism d. transformative