Answer:
Step-by-step explanation:
=7 (1+11+111+1111......n)
=7/9 (9+99+999+9999....n)
=7/9 ((10-1)+(10^2-1)+(10^3-1)+....n)
=7/9 ((10+10^2+10^3...n)-(1+1+1+1.....n))
=7/9 ((10 (10^n-1)/(10-1))-n)
Answer:
Situation: Water is liquid at 40°C above zero and it turns to ice at below zero temperatures. For example, water at 19°C below zero is frozen.
Step-by-step explanation:
The integer that represents 19°C below zero is -19.
The integer that represents 40°C above zero is 40.
The attached number line shows that 40 is at the right of -19. So -19 < 40.
The answer for this problem is two remainder seven