Two angles are complementary. the measure of the smaller angle is four less than the measure of the larger angle. what is the measure of the smaller angle?

Anyone know? will mark brainliest if correct!

The train station clock runs too fast and gains 5 minutes every 10 days. how many minutes and seconds will it have gained at the end of 9 days?

Identify the type of observational study described. a statistical analyst obtains data about ankle injuries by examining a hospital's records from the past 3 years. cross-sectional retrospective prospective