What is s5 for 1000 + 500 + 250 + ?

The sum of first five term is 1937.5.

Step-by-step explanation:

The given series is

Here the first term is 1000 and each term is half of its previous term. The common ratio is

The sum of n terms of a GP is

Where, a is first term, r is common difference, r<1 and n is number of terms.

Therefore the sum of first five term is 1937.5.

change of stock price/initial stock price on friday * total stock value = change of stock value

0.89/73.73 *x = 42.72

x=3539.04 = total stock value at initial stock price on friday .

total stock value at initial stock price on friday/ initial stock price on friday = number of shares

3539.04/73.73 = 48 shares

they own 48 shares of this stock