Answer:
15.3
Step-by-step explanation:
throu the table we know that she earn (20.40-10.20=10.20)for every two hours
so 1 hour will be 10.20/2=5.1
3 hour: 10.20+5.1=15.3
7 units between -12 and -5
Answer:

Step-by-step explanation:
From the question we are told that:
Height of child 
Height of child's shadow 
Height of tree's shadow
Since position of Sun remains constant
Generally the equation for Height of tree h_t mathematically given by


