The political standards of todays race is not valid why

When amy exercises in her fitness center for 1 hr she burns a total of 475 calories.if she burns 9 calories a minute jogging on the treadmill and then burns 6.5 calories a minute pedaling on the stationary bicycle how many minutes of the hour does she spend exercising on the bicycle?

The number of brain synapses is believed to peak at

What is another way name for bd? cf, bd, cf, be