Solve the problem.A cup of coffee is heated to 194° and is then allowed to cool in a room whose air temperature is 
After 11 minutes, the temperature of the cup of coffee is 
Find the time needed for the coffee to cool to a temperature of 102°. Assume the cooling follows Newton's Law of Cooling: U = T + (Uo - T)ekt.(Round your answer to one decimal place.)
A. 15.1 minutes
B. 26.4 minutes
C. 29.7 minutes
D. 41.1 minutes
Answer: B
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Find the length of the curve.The curve r = 6
, 0 ? ? ? 
A. 2?
B. 
?
C. 
(? + 2)
D. 6(? + ln(? + 
))
Write an equation in slope-intercept form of a line satisfying the set of conditions.m = 
; y-intercept (0, -7)
A. y = 
x - 7
B. y = - 
x - 7
C. y = 
x + 7
D. y = - 
x + 7
Solve the problems.On a biology test, a student got 25 questions correct but did not pass. On a second attempt, the student got 37 questions correct. What was the percent of increase?
A. 32.4% B. 12% C. 48% D. 52%
Solve the problem.Cory and Melissa are racing electronic cars around a circular track. They begin at the same time going in the same direction. Cory's car completes a revolution in 45 seconds, while Melissa's car completes a revolution in 40 seconds. How long will it take them before both cars reach the starting point again simultaneously?
A. 720 seconds B. 144 seconds C. 72 seconds D. 360 seconds