Answer:
Observational Study
Step-by-step explanation:
Because she stands by the front door and records each student
4 hours
15 x 4 = 60
$60
C and A
expand the things in parentheses so for C
1/2(x + 16) = 1/2(x) + 1/2(16) = 1/2 x + 8
same process for A
7 miles
35 x 0.2 = 7 miles
Answer
six dollars
