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• if the frequency of a radio station is 88.1 mhz (8.81 × 107 hz), what is the wavelength of the wave used by this radio station for its broadcast? the answer should have three significant figures.
  
• what is most closely a central idea of reagan’s address? a. people brave enough to explore new territory face great risks. b. an event as tragic as this makes one call into question whether to continue on with these explorations. c. the nation cannot let grief hold itself back from carrying on with people’s regular routines. d. losing the challenger was an effect of taking the space program for granted.
  
• select all of the biomolecules that have a carbon-nitrogen bond. responses lipid lipid protein protein peptide peptide nucleic acid nucleic acid carbohydrate
  
• what best describes these two molecules? they are not isomers. they are structural isomers. they are geometric isomers. they are both structural and geometric isomers.
  
• consider this reaction: zn(s) + 2hcl(aq) zncl2(aq) + h2(g). which change could decrease the rate of production of zncl2? a. increasing the [hcl] b. increasing the temperature c. decreasing the volume of h2 d. decreasing the surface area of zn
  
• write an essay that argues your position on the advisability of the 48-hour cell phone ban
  
• the is the brain structure that connects the left and right hemisphere, leading to more efficient information processing.
  
• what's the name of the black hole region that creates the gravitational force holding the milky way together?
  
• which of the following is not true concerning warm-up exercises? a. they should be low-intensity. b. they should get progressively more intense. c. they should last 20 to 30 minutes. d. they should increase heart rate, breathing, and temperature.
  
• yulia is twenty-four years old. she has been fit and lean her whole life and recently has begun to put on an unhealthy amount of weight. she goes to her doctor because she is not eating any differently than she has before, yet she is now heavier. what will yulia’s doctor most likely tell her? adults need fewer calories than kids and teens, so she needs to eat less. adults need more calories than kids and teens, so she needs to eat more. adults are heavier than kids and teens. adults need more exercise than kids and teens.