Answer:
Amanda has 20, Rob has 45
Step-by-step explanation:
Amanda has ten fewer rocks than Andrew, 30-10=20
Rob has 15 more rocks than Andrew, 30+15=45
A=4*<span>π*r^2
A=4*</span><span>π*2^2
=50.3</span>
Answer: $8,347.50 is the value of his account after five years.
Interest is $409.50 per year.
Total amount of interest paid is $2,047.50.
I think that You add all the ages and then divide by how many people you have so
100:10 = 10 is the mean age I guess?