2021 AMC 10B Problems/Problem 1: Difference between revisions
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<math>\textbf{(A)} ~9 \qquad\textbf{(B)} ~10 \qquad\textbf{(C)} ~18 \qquad\textbf{(D)} ~19 \qquad\textbf{(E)} ~20</math> | <math>\textbf{(A)} ~9 \qquad\textbf{(B)} ~10 \qquad\textbf{(C)} ~18 \qquad\textbf{(D)} ~19 \qquad\textbf{(E)} ~20</math> | ||
==Solution | ==Solution== | ||
Since <math>3\pi</math> is about <math>9.42</math>, we multiply 9 by 2 and add 1 to get <math> \boxed{\textbf{(D)}\ ~19} </math> | Since <math>3\pi</math> is about <math>9.42</math>, we multiply 9 by 2 and add 1 to get <math> \boxed{\textbf{(D)}\ ~19} </math> | ||
~smarty101 | |||
Revision as of 17:04, 11 February 2021
How many integer values of 
satisfy 
?
Solution
Since 
is about 
, we multiply 9 by 2 and add 1 to get 
~smarty101
