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kobusy [5.1K]
3 years ago
9

Arif’s grandfather is 9 times as old as Arif. Which of these could be the age of Arif’s grandfather? PLSS THIS IS SO CONFUSING!1

Mathematics
2 answers:
alisha [4.7K]3 years ago
8 0

Answer:

what is the multiple choice how old is arif

Step-by-step explanation:

Volgvan3 years ago
4 0

Answer:

63

Step-by-step explanation:

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Find the circumference of a circle that has an area of 452.16 square meters. (Use 3.1416 as the value of π.)
laila [671]
\bf \textit{area of a circle}\\\\
A=\pi r^2\quad 
\begin{cases}
r=radius\\
-----\\
A=452.16
\end{cases}\implies 452.16=\pi r^2\implies \cfrac{452.16}{\pi }=r^2
\\\\\\
\boxed{\sqrt{\cfrac{452.16}{\pi }}=r}\\\\
-------------------------------\\\\
\textit{circumference of a circle}\\\\
C=2\pi r\qquad \qquad \implies C=2\pi \left( \boxed{\sqrt{\cfrac{452.16}{\pi }}} \right)

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