1. How many centimeters are in 13.4 inches?

34.036 Thats how many

34.036

Explanation:

There are 2.54 centimeters in one inch so you multiply 13.4 and 2.54 to get 34.036.

so here we go

atomic mass

239 + 1 = y + 134 + 3 combine like terms

240 = y + 137             subtract 137 from both terms

240 - 137 = y

103 = y

atomic number

94 = z +54 + 0

94 = z + 54               subtract 54 from both sides.

40 = z

answer

answermeridional ;