6th grade math, help me pleasee.

a) 12 ft/s  (12 feet per second is the rate at which she runs)

b) the tables is completed as follows:

for column 1: 12

for column 2: 24

for column 3: 36

for column 4: 48

Step-by-step explanation:

Notice that since she did 60 feet in 5 seconds, then her speed (which is defined as distance divided by the time it took to cover that distance) is: 60/5 feet/second = 12 ft/s

Now this means that for every second she runs, she covers 12 feet

Then in the first second running she covered 12 ft, after 2 seconds running, she covered 24 ft, after 3 seconds running, she covered 36 ft, after 4 seconds running, she covered 48 ft. And these values complete the requested table.

1) is right

step-by-step explanation:

the answer to the expression is 83