3 years ago

Which of the following is a more precise measurement?

Mathematics

1 answer:

erma4kov [3.2K]3 years ago

3 0

D) 1 hour, 4.5 seconds

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3 years ago

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7^16/7^12=7^-18/? what is the missing denominator

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$\bf \left.\qquad \qquad \right.\textit{negative exponents}\\\\
a^{-{ n}} \implies \cfrac{1}{a^{ n}}
\qquad \qquad
\cfrac{1}{a^{ n}}\implies a^{-{ n}}
\qquad \qquad 
a^{{{ n}}}\implies \cfrac{1}{a^{-{{ n}}}}\\\\
-------------------------------\\\\$

$\bf \cfrac{7^{16}}{7^{12}}=\cfrac{7^{-18}}{x}\implies x\cdot 7^{16}=7^{12}\cdot 7^{-18}\implies x\cdot 7^{16}=7^{12-18}
\\\\\\
x\cdot 7^{16}=7^{-6}\implies x=\cfrac{7^{-6}}{7^{16}}\implies x=\cfrac{7^{-6}\cdot 7^{-16}}{1}\implies x=7^{-6-16}
\\\\\\
\boxed{x=7^{-22}}\implies x=\cfrac{1}{7^{22}}$

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3 years ago

Which is the better unit price: $1.99 for a 3-ounce bottle or $2.49 for a 4-ounce bottle?

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2.49

Step-by-step explanation:

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