Solve the problem.Under certain conditions the wind speed S, in miles per hour, of a tornado at a distance d from its center can be approximated by the function 
where a is an atmospheric constant, and V is the approximate volume of the tornado, in cubic feet. Assume that a is 0.78, and find Sd.
A. 
B. 
C. 
D. - 
Answer: D
Mathematics
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Solve the problem.If 4 is subtracted from a number and this difference is doubled, the result is 5 more than the number. Find the number.
A. 13 B. 4 C. -4 D. -13
Mathematics
Graph the equation. Find seven solutions in your table of values for the equation by using integers for x, starting with -3 and ending with 3.y = x2 + 4
A. 
B. 
C. 
D. 
Mathematics
Find the product.7x2 y(-9x6y + 6x3)
A. -63xy + 42x B. -63x8y2 + 42x5 C. -63x8y2 + 42x5y D. -63x8y2 + 6x3
Mathematics
Graph the solution set of the system of inequalities.y ? -x2 - 6x - 4y ? x2 + 6x + 4
A. 
B. 
C. 
D. 
Mathematics