Answer:
30500 = 3.05·10^4
Step-by-step explanation:
Your calculator can do this for you. You may need to set the display to scientific notation, if that's the form of the answer you want.
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This can be computed by converting both numbers to standard form:
(5·10^2) +(3·10^4)
= 500 +30000 = 30500 = 3.05·10^4
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Addition of numbers in scientific notation in general requires that they have the same power of 10. It may be convenient to convert both numbers to the highest power of 10.
5·10^2 + 3·10^4
= 0.05·10^4 +3·10^4 . . . . now both have multipliers of 10^4
= (0.05 +3)·10^4
= 3.05·10^4
Pamela is incorrect. When you multiply anything negative by a negative, the product will always be a positive. Because the two negative signs cancel each other out.
She could switch them around by grouping them into groups of 4s, 3s, 2s, or 5s.
The hundreds place is underlined: 16,<u>4</u>73.
Look at the number to the right of the hundreds place. It is a 7. Because 7 is greater than 5, round up
16473 rounded to the nearest hundred is 16500
Next, she takes the number to round to the nearest thousand.
Remember that 5 and greater round up.
16500 rounded to the nearest thousand is 17000
17000 is your answer
hope this helps
