A hyperbola centered at the origin has a vertex at (0, 36) and a focus at (0, 39). Which are the equations of the directrices? x = ± y = ± x = ± y = ±.

All of the following are examples of service-learning opportunities except: a. donating time to senior citizen war veterans and writing a report about the experience for your u.s. history class. b. getting a part-time job at a habitat restoration center. c. reading to second-grade students as part of your assigned reading time for your english class. d. planting trees in your community and then discussing global warming in your science class.

Late at night some traffic signals change patterns and become ?

Darwin studied two different types of tortoises on the galapagos islands. sort the characteristics based on which tortoise they describe.