Find an equation of the parabola described.Focus at (5, 0); vertex at (0, 0)
A. y = 20x2
B. y2 = 20x
C. x = 20y2
D. x2 = 20y
Answer: B
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Solve the problem.The square root expression Rf
gives the aging rate of an astronaut relative to the aging rate of a friend on Earth, Rf, where v is the astronaut's speed and c is the speed of light. An astronaut is moving at 60% of the speed of light. Substitute 0.6c in the expression above. What is his aging rate, correct to two decimal places if necessary, relative to a friend on Earth?
A. 0.63Rf B. 0.8Rf C. 0.8 D. 1.17Rf
Find the quotient.0.545 ÷ 5
A. 11.09 B. 1.09 C. 0.109 D. 1.109
Find the probability.A die is rolled 20 times and the number of twos that come up is tallied. Find the probability of getting exactly five twos. Round to the nearest thousandth when necessary.
A. 0.921 B. 0.129 C. 0.003 D. 0.083
Solve the right triangle shown in the figure. 
?B = 26.6°, 
= 2.7 mm, ?C = 90°
A. 
= 1.6 mm, ?A = 63.4°, 
= 2.2 cm
B. 
= 2.4 mm, ?A = 63.4°, 
= 1.6 mm
C. 
= 2.4 mm, ?A = 63.4°, 
= 1.2 mm
D. 
= 1.2 mm, ?A = 63.4°, 
= 2.4 mm