A ball is thrown into the air from height 1.6 m above the ground. It initially gains height at 16.4 ms-1. After 2 seconds, it is falling at 3.2 ms-1. The height of the ball over time can be
modelled by the quadratic function h(t) = at+ bt+c metres, where t is the time in seconds.
a State h(0) and hence find c.
b State h'(0) and hence find b.
c Use the remaining information to find a.
d What was the maximum height reached by the ball, and when did it reach this height?

Ming says that 0.24 > 1/4 because 0.24= 2/4. which best explains mings error

Mrs. julien’s and mrs. castillejo’s classes are selling cookie dough for a school fundraiser. customers can buy packages of macadamia nut chip cookie dough and packages of triple chocolate cookie dough. mrs. julien’s class sold 25 packages of macadamia nut chip cookie dough and 30 packages of triple chocolate cookie dough for a total of $221.25. mrs. castillejo’s class sold 5 packages of macadamia nut chip cookie dough and 45 packages of triple chocolate cookie dough for a total of $191.25. (a) write the system of equations that model the problem. be sure to explain which equation represents which situation. (b) find the cost of each type of cookie. show your work. (c) explain which method you used to solve the system and why you chose that method.

Apply the distributive property to write an expression that is equivalent to 5h + 2hsquared2.