Answer:
a) 45,000,000,000,000
b) 3,500
Step-by-step explanation:
Where there is an exponent and the base is 10, the exponent is how many zeros to add to the end of the number.
a) (5x10,000)x(9x100,000,000)
50,000x900,000,000
45,000,000,000,000
b)(7x1,000,000)/(2x1,000)
7,000,000/2,000
3,500
