Question #bed84

1 Answer

-10.5 or -11 depending on significant figures.

Explanation:

# 0 C^o = 32 F^o# So it is necessary to subtract 32 from the Franheit degrees to get the equivalent Centagrade value.

# 13 - 32 = -19#

The ratio between Franheit and Centagrade is #(5 C)/ (9 F)# or
#(9 F)/(5 C)#.

( Water freezes at 32 F and boils at 212 F a change of 180)
(Water freezes at 0 C boils at 100 C a change of 100)
( # 100/180 = 5/9#)

So multiplying -19 by the ratio #5/9# gives the value of degrees C

# -19 xx 5/9 = - 10.5555.....#

Rounding off to three digits assuming 13.0 gives

-10.5

Rounding off to two digits for two significant digits gives

# -11 C^o#