Answer:
5.43×10^14 or

Step-by-step explanation:
Scientific notation, the number must always be less than 10, in this case 5.43. The exponent represents how much times I moved the decimal point to the left.
Answer:
Maria will have no money left. She will have a negative amount of money.
Step-by-step explanation:120+215= 335-255= 80-294= -214
A) 4 cm
B) 9 cm x 12 cm
C) 108 cm