Water whose temperature is at 100 oC is left to cool in a room where the temperature is 30 oC. After 2 minutes, the water temperature is 88 oC. If the water temperature T is a function of time t given by
, find k. Round your answer to the nearest hundredth.
?
A. 
B. ?
C. ?
D. ?
E. none of these
Answer: C
Mathematics
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For the set of numbers, find the mean, median, and mode. 78, 70, 66, 66, 78, 80
A. mean: 74, median: 74, mode: 66 B. mean: 74, median: 73, mode: 78 C. mean: 73, median: 74, mode: 66 and 78 D. mean: 73, median: 66, mode: 80
Mathematics
Simplify.
A. - 
B. 
C. 
D. 
Mathematics
Solve the equation.
= 5 - 2x
A. 
B. {5}
C. 
D. 
Mathematics
Write the expression as a single trigonometric function.
?
?
A. 
B. 
C. 
D. 
E. 
Mathematics