word problem

Question

the temperature at 3am was -17.3F
by noon the temperature was -17.8F.
at what time was it the coldest?
i said -17.8F
is that right?

word problem

sam is 5/8" taller than jackie.
Shelly is 0.7 in taller than Jackie. who is the tallest?

i guessed is it Jackier ?

Answer 1

yes

5/8 = .625 which is less than .7 so Shelly is tallest

Answer 2

sorry yes jackie .7 tallest.

my dad is
confusing me he said -17.3F is coldest rather than -17.8F

i just want you to reconfirm i think
-17.8F is the coldest at noon?