
The rows add up to

, respectively. (Notice they're all powers of 2)
The sum of the numbers in row

is

.
The last problem can be solved with the binomial theorem, but I'll assume you don't take that for granted. You can prove this claim by induction. When

,

so the base case holds. Assume the claim holds for

, so that

Use this to show that it holds for

.



Notice that






So you can write the expansion for

as

and since

, you have

and so the claim holds for

, thus proving the claim overall that

Setting

gives

which agrees with the result obtained for part (c).
Answer:
3,000,000,000
60,000,000
66,000
900
Step-by-step explanation:
3,060,066,900
:)I dont know is C
If 40% of the cameras are digital, that means 60% of them are not digital.
If 60% of all cameras is 24, then 20% is 8, making 40% 16 cameras.
<u><em>45×60=2700</em></u>
<u><em>And to check divide </em></u>
<u><em>2700÷60=40</em></u>
<u><em>2700÷40=60</em></u>
<u><em>Have a great time miss!</em></u>