Find an equation in standard form for the hyperbola with vertices at (0,+-9) and foci at (0,+-10)

Jackson earns $25 per hour as a tutor at the college library. he set a weekly spending budget of $130 each week and puts the remaining money in his savings account. how many hours must he work this week to have at least an extra $50 to put in his savings account

What is not a question to ask to determine the reasonability of a solution

Asap 40 pts + brainliest to right/best answer only answer if you know for sure