The position, d, in metres of an object in motion as it travels is given by:
d = (1 + 6.3) (1 + 0.1)
t is the time in seconds.
This is an equation of motion.
By looking at it, we can learn about
how the object started moving.
First, expand the brackets.
[3]
The initial velocity is the coefficient
of the t term.
What is the initial velocity? m/s
[1]

Aclassroom is made up of 11 boys and 14 girls. the teacher has four main classroom responsibilities that she wants to hand out to four different students (one for each of the four students). if the teacher chooses 4 of the students at random, then what is the probability that the four students chosen to complete the responsibilities will be all boys?