The credit remaining on a phone card is a linear function of the total calling time made with the card. the remaining credit after 20 minutes of calls is $17.00, and the remaining credit after 33 minutes of calls is $15.05 what is the remaining credit after 39 minutes of calls

Consider a cube that has sides of length l. now consider putting the largest sphere you can inside this cube without any point on the sphere lying outside of the cube. the volume ratio -volume of the sphere/ volume of the cube is 1. 5.2 × 10−1 2. 3.8 × 10−1 3. 1.9 4. 2.5 × 10−1 5. 3.8

Find cot x if sin x cot x csc x = √2

Whats are the trickiest steps to do when adding or subtracting rational expressions? how does knowledge of rational numbers u in adding and subtracting rational expressions?