Answer:
x=133
Step-by-step explanation:
the missing angle plus are supplementary. the missing angle is 47 as a triangle must be 180 degrees.
therefore 180=x+47
Ok to find this we have to divide 12,000/5770 to find the number of half lives
we get <span>2.07972270364
we can round this decimal to 3
3 half lives</span>
Answer:
x=20.26
Step-by-step explanation:
tan40°=17/x
x=17/tan40°
x=20.25981107 or 20.26