Express the rational number as a terminating or repeating decimal number.
A. 0.125
B. 0.085
C. 0.025
D. 0.135
Answer: A
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Solve the quadratic equation by the method of your choice.3x2 = 4x + 7
A. 
B. 
C. 
D. 
Find the circle's circumference or area, as requested. Use 3.14 as the approximate value of ?, and round your answer to the nearest tenth.Find the circumference.
A. 113.0 cm B. 18.8 cm C. 37.7 cm D. 7.6 cm
Evaluate the trigonometric function. Round your answer to four decimal places. (Be sure the calculator is set in the correct angle mode.) ? tan 4.9 ?
A. -4.9675 B. -4.8675 C. -5.1675 D. -4.7675 E. -5.2675
After beginning antiseptic treatment, the number of bacteria in a population decreases at a rate of 20% per hour, that is, dN/dt = -0.20N, where N is the number of bacteria and t is the time, in hours.
(a) When t = 0 , there are 150,000 bacteria present. Find a function that satisfies this equation. (b) How many bacteria will remain after 6 hr?