The concentration C, in parts per million, of a certain antibiotic in the bloodstream after t hours is illustrated in the following graph.
(a) 15 parts per million
(b) 4.5 hr, 35.5 hr
Mathematics
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Indicate whether the variable is qualitative or quantitative.The native languages of students in an English class
A. quantitative B. qualitative
Mathematics
Solve the problem by integration.During each cycle, the velocity v (in ft/sec) of a robotic welding device is given by 
where t is the time (in sec). Find the expression for the displacement s (in ft) as a function of t if 
for 
A. s = t2 - 
tan-1 
B. s = t2 - 
tan-1 
C. s = t2 - 14 sin-1 
D. s = t2 - 14 tan-1 
Mathematics
Write the polynomial in descending order.-9 - 8x2 + 5x4 - 3x3 - 2x
A. 5x4 - 2x - 3x3- 8x2 - 9 B. -9 - 2x - 8x2 - 3x3 + 5x4 C. 5x4 - 3x3 - 8x2 - 2x - 9 D. -9 - 8x2 + 5x4 - 3x3 - 2x
Mathematics
Evaluate the expression.
+ 
A. -57 B. -23 C. -197 D. 63
Mathematics