Ratios can be written in multiple ways such as
a:b
a to b
a/b
So we can write yours in those three ways:
8.4:4.4
8.4 to 4.4
8.4/4.4
11x11=121
$140-121=19
19/7=
It would take approximately 2hours and 71 minutes to meet her requirements.
To start, write your locations as points, with north and south being positive and negative y respectively and east and west being positive and negative x respectively. Doing this gives us the mall at (-3,-2) and the park at (4,5). Now, we use our distance formula

to solve for the unknown distance. Plugging in with the park values as our second values and our mall values as our first values (as well as with our unknown distance as d), we get

. This square root can be rounded to 9.9 miles.
A=10ft because A is 8ft so round that to the nearest ten your answer is 10ft
X = 72 and it's a scalene triangle