Write the number in scientific notation.In a certain city, the bus system carried a total of 11,800,000,000 passengers.
A. 11.8 × 1010
B. 1.18 × 1011
C. 1.18 × 109
D. 1.18 × 1010
Answer: D
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The following table shows the running speed R, in centimeters per second, of ants as a function of the temperature T in degrees Celsius. Use linear regression to model running speed as a function of temperature. T 25.6 30.3 32.3 34.8 R 2.15 3.29 4.87 5.24? ?
A. ?
B. 
C. 
D. ?
Solve using the addition and multiplication principles together.
(6x - 15) = 
(20x - 8)
A. 
B. -10
C. 1
D. -1
Solve the problem.The population of a particular city is increasing at a rate proportional to its size. It follows the function P(t) = 1 + ke0.04t where k is a constant and t is the time in years. If the current population is 18,000, in how many years is the population expected to be 45,000? Round to the nearest year.
A. 23 yr B. 130 yr C. 10 yr D. 13 yr
Solve the equation by factoring.x3 + 3x2 - x - 3 = 0
A. -3, 3 B. 9 C. -1, 1, -3 D. 1, -3, 3