Help me plz asap

42,52,55,56,57

42) 76

b)70

Explanation:

52) because you don't want to confuse different units. one ex)1cm is 1/ 100 of a meter

55) 1 km=1,000 meters

b) 10 decimterers = 1 meter

56)The SI standard for length is the meter the standard for volume is the cubic decimeter

ex) 1cm³=1mL

57) The two scales are the same. but there are no negative temperatures in Kelvin. 0 Kelvin is the lowest temperature possible.

0 Kelvin= -274.5 Celsius