Speed of aubrey = 3000 ft per 10 minutes
= 3000 ft / 10 minute
= 300 ft / 1 minute
= (300 ft / 60) second
= 5 ft/second
Distance she can walk in 10 seconds = 5ft/sec
= 5 ft / seconds × 10 seconds
= 50 ft
Hence she can walk 50 ft in 10 seconds
Answers is
x=5 y=20 (5,20)
Answer: He still owns 64% of the Mr.Williams' original parking.
Step-by-step explanation:
Let x = Area of the original parking plot.
First he sold 20% of his lot to neighbor .
Sold plot = 20% of x = 0.20x [Replace 'of' by '×' and divide number by 100 to remove %]
Reminder= x-0.20x= (1-0.20)x=0.80x
Again he sold 20% of the remainder .
Sold plot = 20% of (0.80x) = 0.20 (0.80x)
= 0.16x
Remainder plot = 0.80x-0.16x= 0.64x
Percent of Mr.Williams' original parking lot does he still own = 
Hence, he still owns 64% of the Mr.Williams' original parking.