Answer:
Hello,
Step-by-step explanation:
I can only explain in mathematics not in English (i am French).
c: number of customers
n: number of good reviews
k: factor of proportionality
1)
p=k*c*n
15000=k*75*100 ==> k=2
if c=250 and n=150 then p=2*250*150=75000
2)
A=b*a/2 since b= 9 and a=4 then 9*4/2=18 (cm²)
A=4*7/2=14 (cm²)
