Solve.The approach ramp used by a daredevil motorcyclist for flying over a collection of flaming railroad ties has a rise of 63 feet for every 90 feet in horizontal distance. Find the grade of the ramp. Round to the nearest whole percent.
A. 75%
B. 70%
C. 14%
D. 0.7%
Answer: B
Mathematics
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Find the mass of the wire that lies along the curve r and has density ?.r(t) = 7i + (8 - 3t)j + 4tk, 0 ? t ? 2? ; ? = 8(1 + sin 4t)
A. 80? units B. 40 + 80? units C. 20 + 80? units D. 16? units
Mathematics
Integrate the function.
A. 
+ 
+ ln 
+ C
B. - 
+ 
+ ln 
+ C
C. - 
+ 
+ ln 
+ C
D. - 
- 
+ 3 ln 
+ C
Mathematics
Write as the sum and/or difference of logarithms. Express powers as factors. log7
A. log720 - log7y - log7x
B. 
log720 - 2 log7y - log7x
C. 3 log720 - 2 log7y - log73
D. 
log720 - 2 log7y - 2 log7x
Mathematics
Solve the equation.3(3x - 6 ) = 27
A. {9}
B. {3}
C. {-3}
D. 
Mathematics