Solve the problem.The voltage E in an electrical circuit is given by E = 1.6 cos 90?t, where t is time measured in seconds. Find the amplitude.
A. 3.2
B. 90?
C. 1.6
D. 90
Answer: C
Mathematics
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Write the number in words.3072
A. Thirty thousand, seventy-two B. Three hundred thousand, seventy-two C. Three million, seventy-two D. Three thousand, seventy-two
Mathematics
Answer yes or no.Let n = 33 ? 52 ? 73. Is 31 ? 51 ? 73 = 1029 a factor of n?
A. Yes B. No
Mathematics
Graph the equation by plotting points.y = x2 - 4
A. 
B. 
C. 
D. 
Mathematics
Multiply.9x2y5(8x3 - 8x2y2 + 5y3)
A. 72x5y5 - 72x2y5 - 45x2y6 B. 72x5y5 - 72x4y7 + 45x2y8 C. 72x6y6 + 72x6y8 + 45x3y9 D. 72x5 - 72x4y7 + 45y8
Mathematics