Law of indices (or exponents)
1. (2x)^3 * (2x)^7 * (2x)^ -2
2. (a/2)^5 * (a/2)^-1 * (a/2)^4

step-by-step explanation:

given perimeter: 28cm

length: 9cm

atp,

2(l+w)=p of the reactangle

2(9+x)=28

18+2x=28

2x=28-18

x=10/2

x=5

therefore width is 5 cm

b and c

step-by-step explanation:

570, the answer is 570, hope it

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