Solve the equation.7(x - 4) + 1 = 7x - 6
A. x = 3.0
B. x = 21
C. x = 1.5
D. The equation is a contradiction.
Answer: D
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Evaluate. The differential is exact.
A. 1
B. 3
C. 
D. 0
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
Illustrate and find the product by the indicated method.Use repeated addition on your calculator to find 6 × 458.
A. 458 × 458 × 458 × 458 × 458 × 458 = 2748 B. 458 + 458 + 458 + 458 + 458 + 458 = 2748
Solve the problem.The voltage E in an electrical circuit is given by E = 1.7 cos 50?t, where t is time measured in seconds. Find the frequency of the function (that is, find the number of cycles or periods completed in one second).
A. 
B. 
C. 25
D. 50