Answer:
675 feet
Explanation:
let d be distance and t the time
given d is directly proportional to t , then the equation relating them is
d = kt² ← k is the constant of proportionality
to find k use the condition d = 75 when t is 2 , then
75 = k × 2² = 4k ( divide both sides by 4 )
18.75 = k
d = 18.75t² ← equation of proportionality
when t = 6 seconds, then
d = 18.75 × 6² = 18.75 × 36 = 675 feet