Find the circumference and area of a circle having the given diameter or radius. Use 3.14 for ?. Round your results to the nearest tenth.r = 20 mi
A. 125.6 mi; 125.6 mi2
B. 62.8 mi; 5024 mi2
C. 125.6 mi; 1256 mi2
D. 62.8 mi; 251.2 mi2
Answer: C
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Solve the problem. Use ? = 3.14 when necessary.A certain marine engine has cylinders that are 3.25 cm in diameter and 4.85 cm deep. Find the total volume of 6 cylinders.
A. 593.9 cm3 B. 482.6 cm3 C. 40.2 cm3 D. 241.3 cm3
Use the rules of exponents to simplify the expression. Write the answer with positive exponents. Assume that all variables represent positive real numbers.
1/2
A. xy1/2
B. 
C. xy
D. xy2
Provide an appropriate response.Find all of the higher-order derivatives of x(t) = x4 - 3x2 - x. Use your graphing calculator to graph x(t) and x'(t) on the same axes. Verify that when x(t) is decreasing (sloping downward), the value of x'(t) is negative. Repeat this for x'(t) and x''(t), for x''(t) and x'''(t), and for x'''(t) and x(4)(t).
What will be an ideal response?
Solve the special system by elimination. If the system is dependent, write the solution using set-builder notation with the common line expressed in slope-intercept form.
A. ?
B. {(x, y)|y = -8x + 3}
C. 
D. {(x, y)|y = 8x + 3}