Ratio and Proportion: 100: 2 :: 60: X. Find x.
X=1.2
X=1.6
X=12
X=2.2
Correct Answer : A
The proportion equation of the ratio 100:2=60:X is
\(\frac{100}{2}=\frac{60}{X}\)
Cross-multiply to find the value of X
\(100x\ =\ 120\)
Divide both sides by 100
\(\frac{100x}{100}=\frac{120}{100}\)
\(x\ =\ 1.2\)
The value of X is 1.2
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Correct Answer is A
Explanation
The ratio of females to students enrolling to nursing school is 7:8. So the percent of girls in the class is:
\(\frac{7\ }{8\ }\ast100\%\ =\ 87.5%\)
Therefore, the class is made of 87.5% of females enrolling to a nursing school
Correct Answer is ["1132"]
Explanation
We utilize the Military time chart below convert 11:32 AM to Military Time
From the chart above, 11:00 AM to Military is 1100 hrs, then it follows that 11:32 AM is 1132 hrs
Correct Answer is C
Explanation
A ration of the form a:b = c:d is converted to a proportion as \(\frac{a}{b}=\frac{c}{d}\) where b and d are not equal to zero. Now applying the same concept to 3:10=12:X yields,
\(\frac{3}{10}=\frac{12}{X}\)
Find the value of X by cross-product
\(3X=12\ast10\)
Divide both sides by 3
\(\frac{3X}{3}=\frac{120}{3}\)
\(X=40\)
Thus, the value of X is 40.
Correct Answer is D
Explanation
To change mL to L, use the relation 1000 mL = 1 L and apply dimension analysis as follows:
\(300\ mL\ast\frac{1L}{1000mL}=0.3\ L\)
Thus, 300 mL is equal to 0.3 L.
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