Divide.-2.05 ÷ 5
A. 0.41
B. 4.1
C. -0.41
D. -4.1
Answer: C
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Solve the problem.It is necessary to have a 40% antifreeze solution in the radiator of a certain car. The radiator now has 70 liters of 20% solution. How many liters of this should be drained and replaced with 100% antifreeze to get the desired strength?
A. 28 L B. 17.5 L C. 23.3 L D. 35 L
Solve the problem.A pulley rotates through 83° in one minute. How many rotations does the pulley make in an hour?
A. 27.7 rotations B. 498.0 rotations C. 249.0 rotations D. 13.8 rotations
Write the function in terms of its cofunction. Assume that any angle in which an unknown appears is an acute angle.cos 64°
A. cos 154° B. sin 26° C. sec 26° D. sin 64°
Multiply.(12 - x6)(12 + x6)
A. 144 + x6 B. 144 - x12 C. 144 - x36 D. 144 - x6