Isabela is an astronomer studying stars a and b. star a is farther away from isabela and yet when isabela observes the stars, the stars appear to have the same brightness.

which would be the best explanation for this?
- the stars have the same luminosity.
- star a is more luminous than star b.
- star b is more luminous than star a.

nvrm the answer was b

* this is actually earth space science, but they didnt have that as an option.

Which of the following produces carbon dioxide? a. plants b. animals c. decomposers d. all of the above

Aremote community desperately needs more electrical energy. it is located in an area with the following characteristics: average wind speed of 15 – 20 km/hr some medium-sized rivers with slow-moving currents few coal deposits some oil exploration being conducted within 400 miles based on the above information, which energy source would be the most economical and safest for the community to pursue? a. fossil fuel b. hydroelectric c. nuclear d. wind

Which of these internal feedback reactions does not need your brain? oa. your leg jumping when it is hit by a reflex hammer b. your deeper breathing when you need more oxygen c. your body temperature rising when you have an infection d. your heart beating faster when you are in danger