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A doctor orders 300 milliliters (mL) of a certain medicine at a 40% solution. The pharmacy has the medicine available only in 50% and 25% solution. The pharmacist will mix xmL of the 50% solution with ymL of the 25% solution to obtain the desired 40% solution. Which of the following is the value of x?
A.40
B.120
C.180
D.260
| 重點單詞 | 查看全部解釋 | |||
| multiple | ['mʌltipl] |
想一想再看 adj. 許多，多種多樣的 |
聯想記憶 | |
| certain | ['sə:tn] |
想一想再看 adj. 確定的，必然的，特定的 |
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| pharmacist | ['fɑ:məsist] |
想一想再看 n. 藥劑師，藥商 |
聯想記憶 | |
| obtain | [əb'tein] |
想一想再看 vt. 獲得，得到 |
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| solution | [sə'lu:ʃən] |
想一想再看 n. 解答，解決辦法，溶解，溶液 |
聯想記憶 | |
| available | [ə'veiləbl] |
想一想再看 adj. 可用的，可得到的，有用的，有效的 |
聯想記憶 |
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