Using n to represent the cost of an item in dollars before tax and t to represent the amount of sales tax in dollars for that it
1 answer:
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Answer:
60
Step-by-step explanation:
Answer:
Step-by-step explanation:
In order to add or subtract numbers in scientific notation, the powers of ten must have the same exponent. In this caes the diameter of an average human body cell is a power of -4 and the diameter of a plant cell is a power of -3. In order to add them, we can move the decimal over for the body cell diameter:
Add the two values: