7. Find (3.2 x 107) + (4,000). Express your answer in scientific notation. A 8 X 10^4 B 8 x 10^3 C 0.8 x 10^3 D 8 X 10^7​

Julia is going for a walk through the neighborhood. what unit of measure is most appropriate to describe the distance she walks?

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Which situation can be modeled by the inequality 5 + 10w ≥ 45? a. you start with $5 and save $10 a week until you have at least $45. b.you start with 5 baseball cards and purchase 10 cards every week until you have at most 45 cards. c.you start with 5 water bottles and purchases cases of 10 water bottles each until you have a total of 45 water bottles. d.you spend $5 plus $10 per week until you have less than $45.