Express the series using sigma notation. 1 + 4 + 16 + + 256.

D) is the correct option .

Step-by-step explanation:

Given  : 1 + 4 + 16 + ... + 256.

To find : Express the series using sigma notation.

Solution : We have given that

1 + 4 + 16 + ... + 256.

We can see the relation between the numbers in series.

So we can write the series as .

But value of k lies from 0 to 4.

Then Sum  : .

Therefore, D) is the correct option .

i think it would be 43 movies that would have to be watched.

step-by-step explanation:

think about it. for the second plan, every month is 8 dollars. 8 x 12= 96. so thats the number for the second plan. now for the first plan, its annual meaning you have to pay 10 dollars every year. so now you have to get an equivalent amount of 86 since 96-10=86. 86 divided by 2 since every movie costs 2$ then you would have to watch 43 movies a year to get the same as the second plan. i really hoped this . have a wonderful day as well!