Pls help asap!! ill give brainliest: The height in meters, S, of a rocket t seconds after being launched with an upward velocity of 80 meters per second may be approximated by this equation:
S = 80t - 5t^2
How many seconds after launch is the rocket first 140 meters above the ground?
A. 14
B. 5.3
C. 8
D. 2

Find the exact value of each of the following. in each case, show your work and explain the steps you take to find the value. (a) sin 17π/6 (b) tan 13π/4 (c) sec 11π/3

Click an item in the list or group of pictures at the bottom of the problem and, holding the button down, drag it into the correct position in the answer box. release your mouse button when the item is place. if you change your mind, drag the item to the trashcan. click the trashcan to clear all your answers. solve this quadratic equation using the quadratic formula. 2x2 - 2x=1 need asap

If i have 20$ and i gave 5$ away how much i got