Select the true statments A.
81 is a perfect square.
B.
32 is neither a perfect square nor a perfect cube.
C.
81 is both a perfect square and a perfect cube.
D.
729 is a perfect cube.
E.
75 is a perfect cube.

Part of the total score for each program is the sum of five program component scores. on the free program, the sum of these five program component scores is multiplied by a factor of 2.0. yuzuru hanyu, of japan, earned scores of 9.07, 8.96, 8.89, 9.21, and 9.36 for the program components portion of his free program. how many total points did he receive for this portion?

Last month, a 770 g box of cereal was sold at a grocery store for $3.10. however, this month, the cereal manufacturer launched the same cereal in a 640 g box, which is being sold at $2.50. what is the percent change in the unit price?

Anyone know these questions? i need ,.