The circumference of a circle is given by
where
is the radius of the circle. What is the circumference of a circle with a 6-in. radius?
?
A.
B.
C.
D.
E.
Answer: A
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Find the focus and directrix of the parabola.y2 = -12x
A. (3, 0); x = -3 B. (0, -3); y = 3 C. (-3, 0); x = 3 D. (-3, 0); y = 3
Solve.Muffy buys pencils, sharpeners, and erasers from the bookstore for her class. She bought 4 more pencils than sharpeners and 5 fewer erasers than sharpeners. A pencil costs 21 cents; a sharpener costs 39 cents; and an eraser costs 20 cents. If Muffy spent a total of $13.44, how many erasers did she buy?
A. 22 erasers B. 21 erasers C. 17 erasers D. 12 erasers
Solve. Write a mixed numeral for the answer.Amy decided to bake bread and a cake. For the bread she needed 3 cups of flour. For the cake she needed 1
cups of flour. She had 6
cups of flour. How much flour did she have left over?
A. 2 cups
B. 2 cups
C. 1 cups
D. 1 cups
Perform the indicated operation. ?
A.
B.
C.
D.