Use the formula d = rt to find the value of the missing variable.t = 210 sec, r = 10 feet per second
A. d = 2100 ft
B. d = 21 ft
C. d = 
ft
D. d= 21,000 ft
Answer: A
Mathematics
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Use the pH scale to answer the question.What is the pH of a solution with a hydrogen ion concentration of 10-9 mole per liter? Is this solution an acid or a base?
A. pH = 9; base B. pH = 3; acid C. pH = 7; neutral D. pH = 10; base
Mathematics
Solve the inequality and graph the solution set.| r + 7 | > 6
A. ?
B. (-?, -13) ? (-1, ?)
C. (-13, -1)
D. (-1, ?)
Mathematics
Write the rational number in lowest terms.
A. 
B. 
C. 
D. 
Mathematics
Given that the graph of f passes through the point (4, 69) and that the slope of its tangent line at (x, f(x)) is 11x ?3, find f (1) .
Select the correct answer. a. –4.5 b. 8 c. 12 d. 11 e. 1
Mathematics