Write the number in standard form.3 ten millions + 1 ten thousand + 5 thousands + 8 hundreds + 4 tens
A. 3,015,840
B. 30,105,840
C. 30,015,840
D. 3,001,584
Answer: C
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Use the shell method to find the volume of the solid generated by revolving the shaded region about the indicated axis.About the y-axisx = 3
A. 
?
B. 18?
C. 
?
D. 27?
Solve each of the following systems of equations. If the system is inconsistent or dependent, say so. x - 6y = 28-4x - 7y = 12
A. (-4, -3) B. No solution C. (4, -4) D. (3, -3)
Solve the problem using the quadratic formula.When water runs out of a hole in a cylindrical container, the height of the water in the container can often be modeled by a quadratic function. Assume that the height of the water in a particular metal can with a small hole can be modeled by h = 0.0005x2 - 0.15x + 8, where x is the time (sec) and h is the height (cm). Use the quadratic formula to estimate the time when the height is 6 cm. Round your answer to the nearest second.
A. 21 sec B. 20 sec C. 18 sec D. 14 sec
Simplify the expression. Assume that all variables are real numbers.
A. 
y3
B. Not a real number
C. xy3
D. x3