Answer:
35 units
Step-by-step explanation:
Using Pythagoras Thereoem:
a² + b² = c²
21² + 28² = c²
c = √21² + 28² = √441 + 784 = √1,225 = 35 units
999 divided by 9 is 111
4
Given
← evaluate the denominator
= ← perform the division
= 4