Estimate the sum or difference by first rounding each number to the nearest hundred.2974.69 - 909.7
A. 3000
B. 2000
C. 1900
D. 2100
Answer: D
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Solve the problem.The following directed graph shows how rumors spread among six neighbors: Carl, Dennis, Tammy, Wade, Sandra, and Florence. Which neighbor(s) could start a rumor that could eventually spread to all the others? 
A. Florence, Tammy, Wade, and Sandra B. Dennis C. All neighbors D. Carl
Find the slope of the line with the given inclination. Round your answer to the nearest thousandth, if necessary.45°
A. 1
B. 
C. -1
D. 
Solve the problem. Round your answer to the nearest tenth, when appropriate. Use the formula 
, as needed.Find the pH if [H3O+] = 1.0 × 10-5.
A. 9 B. 5 C. -9 D. -5
In calm waters, the oil spilling from the ruptured hull of a grounded tanker spreads in all directions. Assuming that the polluted area is circular, determine how fast the area is increasing when the radius of the circle is 20 ft and is increasing at the rate of 1/6 ft/sec. Round to the nearest tenth if necessary.
What will be an ideal response?