Difference between revisions of "1955 AHSME Problems/Problem 1"
(Created page with "== Problem == Which one of the following is not equivalent to <math>0.000000375</math>? <math> \textbf{(A)}\ 3.75\times 10^{-7}\qquad\textbf{(B)}\ 3\frac{3}{4}\times 10^{-7}...") |
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==Solution== | ==Solution== | ||
− | First of all, <math>0.000000375 = 3.75 \times 10^{-7}</math> in scientific notation. This eliminates <math>\textbf{(A)}\ 3.75\times 10^{-7}</math>, <math>\textbf{(B)}\ 3\frac{3}{4}\times 10^{-7}</math>, and <math>\textbf{(C)}\ 375\times 10^{-9}</math> immediately. <math>\textbf{(E)}\ \frac{3}{80000000}</math> is a bit harder, but it can be rewritten as <math>\frac{3}{8} \cdot 10^{-7}</math>, which is the same as <math>3.75 \times 10^{-7}</math>, so the answer is | + | First of all, <math>0.000000375 = 3.75 \times 10^{-7}</math> in scientific notation. This eliminates <math>\textbf{(A)}\ 3.75\times 10^{-7}</math>, <math>\textbf{(B)}\ 3\frac{3}{4}\times 10^{-7}</math>, and <math>\textbf{(C)}\ 375\times 10^{-9}</math> immediately. <math>\textbf{(E)}\ \frac{3}{80000000}</math> is a bit harder, but it can be rewritten as <math>\frac{3}{8} \cdot 10^{-7}</math>, which is the same as <math>3.75 \times 10^{-7}</math>, so the answer is <math>\textbf{(D)}\ \frac{3}{8}\times 10^{-7}</math>. |
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==See Also== | ==See Also== | ||
Revision as of 17:18, 29 April 2017
Problem
Which one of the following is not equivalent to ?
Solution
First of all, in scientific notation. This eliminates , , and immediately. is a bit harder, but it can be rewritten as , which is the same as , so the answer is .
See Also
1955 AHSC (Problems • Answer Key • Resources) | ||
Preceded by First Question |
Followed by Problem 2 | |
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All AHSME Problems and Solutions |
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