Hey you guys plz me with those 3 questions i will really appreciate your . i will give 20+ pts.! 1. the california tiger salamander is an endangered species, which decreases at the rate of 4.6% per year in a habitat that currently has 60 of them. write an exponential function and find how many california tiger salamanders will be left after 4 years. 2. factor and solve the following equation 2x2 + x - 21 = 0. 3. alvin throws the football to a receiver who jumps up to catch the ball. the height of the ball over time can be represented by the quadratic equation -4.9t2 + 7.5t + 1.8 = 2.1 . this equation is based on the acceleration of gravity -4.9 m/s2, the velocity of his pass is 7.5 m/s and releases the football at a height of 1.8 meters, and the height where the receiver catches the ball of 2.1 meters. put the equation in standard form and then solve by using the quadratic equation.