Square root of 9 is 81 (9x9) plus 3 = 84
please mark my answer as the brainliest
Answer:

mass = 3.645 g
volume = 9×9×9
= 729 cm³
density = 3.645/729
= 0.005 gcm^-3
Step-by-step explanation:
the volume is 729 cm³ cause the given height is 9cm and it is a cube. cube has equal sides so their lengths are the same.
volume = length × height × width
-80*-31 is actually -80×31
so the answer is 2480
hope this helps feel free to ask
6.4
1/2 * 5.4 * 7.1 sin60
Mark brainliest please
Answer:
2.83
Step-by-step explanation: