Here is some record keeping from a coffee shop about their paper cups. Cups are delivered 2,000 at a time. Explain what a positive and negative number means in this situation. How many paper cups are left at the end of the week? How many cups do you think were used on Thursday? Explain how you know.

225

Step-by-step explanation:

The sum of this series is given by the formula:

Where

S_n is the sum

a is the first term (we get this by plugging in n = 1 into "2n-1", we have 2(1) - 1 = 1)

n is the number of terms (the sum is defined for n = 1 to n = 15, so 15 terms)

d is the common different (the difference is successive terms. Here, 2nd term would be 2(2) - 1 = 3, and first term was 1, so d = 3 -1 = 2)

plugging in the info, we will get the sum:

The sum is 225