Let's make something clear: for all intents and purposes, a 1540+ on an SAT is equivalent to a perfect 1600. No top college is going to give you more credit for a 1580 than a 1550. You've already crossed their score threshold, and whether you get in nowdepends on the rest of you...
When you are finished entering your equation, tap the "=" sign in the lower-right corner to view the answer. It will be displayed as a fraction. You can view your answer in decimal format in the upper-right corner. Tap the icon that resembles a checkmark next to some lines next to...