Solve the problem.The voltage E in an electrical circuit is given by E = 1.2 cos 80?t, where t is time measured in seconds. Find the amplitude.
A. 2.4
B. 1.2
C. 80?
D. 80
Answer: B
Mathematics
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Express the number in scientific notation.428.2
A. 4.282 x 10-3 B. 4.282 x 103 C. 4.282 x 102 D. 4.282 x 10-2
Mathematics
Use the commutative and/or associative laws to rewrite the given expression. Label each step with a reason.(y + z) + 4 as (4 + z) + y
What will be an ideal response?
Mathematics
Evaluate the expression for x = -2, y = 3, and a = -4.
A. - 1 B. 9 C. 33 D. 19
Mathematics
Change to a percent.
A. 5
%
B. 66
%
C. 51
%
D. 511
%
Mathematics