2021 AMC 10B Problems/Problem 1: Difference between revisions
No edit summary |
No edit summary |
||
| Line 2: | Line 2: | ||
<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== | |||
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)}\ ~9} </math> | |||
Revision as of 16:35, 11 February 2021
How many integer values of 
satisfy 
?
Solution
Since 
is about 
, we multiply 9 by 2 and add 1 to get 
