Find the derivative.y = -10e4x
A. -40xe4x
B. -10xe-40x
C. -40e4x
D. -10e-40x
Answer: C
Mathematics
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Find the mass of the wire that lies along the curve r and has density ?.r(t) = 5i + (9 - 3t)j + 4tk, 0 ? t ? 2? ; ? = 9(1 + sin 9t)
A. 90? units B. 10 + 90? units C. 18? units D. 20 + 90? units
Mathematics
Find the indicated limit if it exists.
A. does not exist B. 4 C. 0 D. 1/4
Mathematics
Solve.0.6x - 0.3(20 + x) = 0.75(20)
A. x = 35 B. x = 70 C. x = 60 D. x = 80
Mathematics
Solve the problem.A high school basketball team has 12 members. If 7 of the team members are juniors and the rest are seniors, find the fraction of the team members that are seniors.
A. 
B. 
C. 
D. 
Mathematics