Encontre os produtos a seguir a) 2/5 × [-2/3]=

b) (-6,4) × (1,6)=

c) (-6,4) × (1,6)=

d) (-0,7) × (-2,35)=
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He mass of a single atom of carbon can be found by dividing the atomic mass (12.01 g) by 6.022 x 10^23. which is the mass of a single carbon atom, correctly written in scientific notation with the correct number of significant figures?

Olga bought a new skirt that cost $20. sales tax is 5%. how much did olga pay, including sales tax? 7.

Joey is asked to name a quadrilateral that is also a rhombus and has 2 pairs of parallel sides. should be his answer