What is the best estimate for the width of your index finger

What is f(3) for the quadratic function f(x)= 2x^2+ + x - 12

Students are given 3 minutes for each multiple-choice question and 5 minutes for each free-response question on a test. there are 15 questions on the test, and students are given 51 minutes to take it. how many multiple-choice questions are on the test?

Estimate the distance between orlando and jacksonville