5:3....added = 8
5/8(144) = 720/8 = 90 adults
3/8(144) = 432/8 = 54 children
Answer:

Step-by-step explanation:
current value is $30
as it increases at a rate of 5% each year
after n year the value will be 
so for 20 years it will be 
it gives 79.59893 so we can round it to 79.60
Lyndal invested $3000 and Morton invested $2000
Assuming you're asking for the area and the length is 52 ft...
52 x 9 = 468
Area; 468 ft squared