The correct way of writing the cardinal number 30,000 using...

Read the text and answer questions 46, 47 and 48.

1 The pilot of a Beech Baron airplane noticed that one of

his engines was on fire. He contacted the nearest air traffic

control center to ask for help.

The voice __________ the radio answered, “This is the

5 Control Tower. “Please inform your altitude”.

The pilot replied, “We are at 30,000 feet”.