Identify the x- and y-intercepts of the following.
A. (1, 0) (0, -2)
B. (-2, 0) (0, -1)
C. (-1, 0) No y-intercept
D. (-1, 0) (0, -2)
Answer: D
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The table below shows the number C, in millions, of cell phone subscribers t years after 2005. t 0 1 2 3 4 C 211.90 236.17 253.41 276.33 288.64? A: Use exponential regression to model the number of subscribers as a function of time. Round your answer to two decimal places.B: Plot the exponential model along with the data points.C: According to the exponential model, what is the yearly percentage increase in cell phone subscribers? Round your answer to the whole number.
What will be an ideal response?
Factor the difference of two squares.81x2 - 1
A. (9x - 1)2 B. (9x - 1)(9x + 1) C. prime D. (9x + 1)2
Write the number without exponents.7.142 × 107
A. 714,200,000 B. 71,420,000 C. 499.94 D. 7,142,000
Solve.Emily, Nicole, and Courtney enter a 47.8-mile bicycle team relay race. They complete the course in 2.57 hours. What was their average speed on the course? (Round to the nearest tenth.)
A. 0.5 mi/hr B. 0.1 mi/hr C. 1.9 mi/hr D. 18.6 mi/hr