B. -9

a)-200

b)-270

c)150000

d)-169

(-5).6= -30

9.(-3)= -27

(-10).11= -110

150.(-4)= -600

7%=0,07

45%=0,45

216%=2,16

A. Fine, thanks.

B. It’s not your  fault

C. I’ll do better next time

D. It’s mine. I came late.

For centuries people have regarded oceans _____ an inexhaustible supply of food, a useful transport route, and a convenient dumping ground - simply too vast to be affected by anything we do.

A. with

B. by

C. of 

D. as