Find the required ratio.The specific gravity of a substance is the ratio of its density to the density of water. If the density of a substance is 
and that of water is 
what is the specific gravity of the substance, correct to the nearest hundredth?
A. 1.14
B. 7.12
C. 0.14
D. 8.12
Answer: B
Mathematics
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Evaluate the expression for the given replacement values.0.61 ÷ x for x = 9.76
A. 0.00625 B. -0.375 C. 0.0625 D. -0.0375
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Use identities to simplify the expression.cot x sec x sin x
A. tan2 x B. sec2 x C. csc2 x D. 1
Mathematics
Solve the equation.log x + log (x - 1) = log 20
A. {5}
B. 
C. {-4}
D. {5, -4}
Mathematics
Solve the problem. Round your answer to the nearest tenth.The roof of a building is in the shape of the top half of the hyperbola y2 - x2 = 75, where x and y are in meters. Refer to the figure and determine the height h of the outside walls. 
? a = 9.0 m b = 9.0 m
A. 6.0 m B. 12.5 m C. 156.0 m D. 66.0 m
Mathematics