Answer:
D
Step-by-step explanation:
i had the same question
<u>650 cannonballs
</u>
Explanation step by step:
upper layer = 1 ^ 2
second layer = 2 ^ 2
third layer = 3 ^ 2
layer 12 is 12 ^ 2
<u>The formula is:
</u>
<u>n * (n + 1) * (2n + 1) / 6
</u>
<u>n = 12
</u>
<u>12 (12 + 1) (2 * 12 + 1) / 6
</u>
<u>12 * 13 * 25/6 =
</u>
<u>650
</u>
<u>
</u>
There are 650 cannonballs in this pyramid.
24 yrs, might not be the answer
3%=0.03 you have to get to 6%=0.06
So you find the value of each month in 3%
So 3% divided by 12 months = 0.0025
Now you have the value of each month MULTIPLY until you get 0.06
So: 0.0025 x 1, 2, 3, 4,…….. and so forth
So the your result will be
0.0025per months x 24yrs = 0.06 = 6%
24 years
Answer:
b + b + 7 = 23
2b + 7 = 23
Step-by-step explanation:
b = girls
b + 7 = boys
