BRAINLIEST FOR BEST ANSWER! 25 POINTS! pls help! question in the picture!

According to modern science, earth is about 4.5 billion years old and written human history extends back about 10,000 years. suppose the entire history of earth is represented with a 10-meter-long timeline, with the birth of earth on one end and today at the other end.

Angles r and s are complementary. the measure of angle r is 31 degrees. which equation can be used to find angle s?

Timmy uses 1 1 2 cups of sugar for every 2 gallons of lemonade he makes. how many cups of sugar would timmy use if he makes 13 gallons of lemonade?