Question

HELP ME
You are Miguel Cervantes de Navas y Colon, captain in the Royal Spanish Army in Sevilla in the year 1842. Outside your barracks window, there is a stack of cannonballs, as shown in the illustration. On an idle afternoon you decide to calculate how many cannonballs are in the stack. What is the number of cannonballs?


A. 479
B. 422
C. 385
D. 506

Answer 1

@Mehek14

Answer 2

@peachpi

Answer 3

illustration?

Answer 4

wait

Answer 5

http://media.apexlearning.com/Images/200712/20/8ba535c2-43b0-4b8e-8ca1-895ff1a01c7f.gif

Answer 6

??

Answer 7

the patter is the top is \(1^2\)
after that it's \(2^2,3^2,4^2\)...and so on

Answer 8

i dont understand

Answer 9

so add
\(1^2+2^2+3^2+4^2+5^2+6^2+7^2+8^2+9^2+10^2+11^2\)

Answer 10

506?

Answer 11

yes 506

Answer 12

thx