Can I have help with this question

a) 450,000,000,000  (450 Billion)

b) 3500

Step-by-step explanation:

a) (5 x 9) · 10^(3+7)

   45 x 10^10

b) (7 ÷ 2) · 10^5-2

   3.5 x 10^3

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

the correct answer is you spend $55.78 more in a brand store that buy ing in a normal store.

step-by-step explanation:

brand = spend   $ 135.85 total

store = spend $80.07 total