Question

I tried this and found it really difficult please help

Answer 1

4.75 or 4 3/4

Explanation:

Since all values are given, we can substitute all the values into the equation to find s.

s =
`ut+(1)/(2) at^(2) \\= (10)((1)/(2)) +(1)/(2) (-2)((1)/(2)) ^(2)\\=5 + (-1)((1)/(4) )\\=5+(-(1)/(4) )\\=5-0.25\\=4.75 or 4(3)/(4)`