Subtract. 86,700,000 − 3.45 × 10^7 5.22 5.22×10^6 5.22×10^7 5.22×10^8

86,700,000 − 3.45 × 10^7

= 8.67 × 10^7  − 3.45 × 10^7

= (8.67 - 3.45) × 10^7

= 5.22 × 10^7

Hope it helps

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