Solve the problem.The electric current (in A) in a certain circuit as a function of time (in s) is i = 4 + 7t. What total charge passes a point in the circuit in 9 s?
A. 603 C
B. 67 C
C. 287.5 C
D. 319.5 C
Answer: D
Mathematics
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A stream of water moving at the rate of v feet per second can carry particles of size 
inches. Find the size of the largest particle that can be carried by a stream flowing at the rate of 
foot per second. (Round your answer to three decimal places.)
?
A. 0.067 B. 0.087 C. 0.047 D. 0.057 E. 0.077
Mathematics
Solve the equation.4(x + 6) = -12
A. x = -6 B. x = -9 C. x = -36 D. x = 9
Mathematics
Find the exact value of the trigonometric expression without the use of a calculator.cos
A. - 
B. - 
C. 
D. - 
Mathematics
Multiply.8x2(6x2 + 4x - 2)
A. 48x4 + 32x2 - 16 B. 48x4 + 32x - 16 C. 14x4 + 12x + 6 D. 48x4 + 32x3 - 16x2
Mathematics