Calculate the arc length of the indicated portion of the curve r(t).r(t) = (10 - 2t)i + (2 + 9t)j + (6t - 2)k, 5 ? t ? 9
A. 1694
B. 154
C. 44
D. 484
Answer: C
Mathematics
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Find the limit.Let 
f(x) = 5 and 
g(x) = 6.Find 
.
A. 121
B. 11
C. 
D. 
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Rationalize the denominator. Assume that all variables represent positive real numbers.
A. 7a
B. 
C. 
D. 43
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Solve the problem.An initial investment of $1000 is appreciated for 2 years in an account that earns 5% interest, compounded semiannually. Find the amount of money in the account at the end of the period.
A. $1102.50 B. $103.81 C. $1103.81 D. $1076.89
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Multiply.
?
?
A. 90,850 B. 8,690 C. 9,185 D. 418 E. 9,085
Mathematics