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Scientific notation on calculators

At 2.4×1082.4 \times 10^82.4×108 years old, the Nyasasaurus parringtoni may be the oldest known dinosaur that lived on Earth. How many millions of years old is it?\newline\newline____ million years old\newline
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During its orbit around the sun, Venus gets as close as 4×1074 \times 10^74×107 kilometers from Earth and as far as 2.6×1082.6 \times 10^82.6×108 kilometers from Earth. What is the difference between these distances? Write your answer in scientific notation.\newline______ kilometers\newline
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Evaluate:\newline3.143.143.14×\times×492\frac{49}{2}249​
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y=x2−2x−3 y=x^{2}-2 x-3 y=x2−2x−3\newlineFind the vertex of the following parabola.
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Simplify. Your answer should be in proper scientific notation:\newlineTriple 6.2×103 6.2 \times 10^{3} 6.2×103
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