Suppose Jos car is parked 18 meters from her house Jo is 3 m

Suppose Jo\'s car is parked 18 meters from her house. Jo is 3 meters from her house, directly between her house and her car, when all of a sudden she begins walking towards her car a constant speed. 4 seconds after she started walking Jo is 9 meters from her house. Let d represent Jo\'s distance from her house (in meters) and let t represent the number of seconds since Jo started walking. Complete the following sentence by filling in the answer-boxes with numbers: Jo walks at a constant speed and covers 6 meters every 4 seconds. Since 1 second is times as large as 4 seconds, every time Jo walks for 1 second her change in distance from the house is times as large as 6 meters. Therefore, Jo walks meters every second. Suppose the value of t increases from 4 to 7.6. Complete the following sentence by filling in the answer-boxes with numbers: Jo walks at a constant speed and covers 6 meters in 4 seconds. Since 3.6 seconds is times as large as 4 seconds, every time Jo walks for 3.6 second her change in distance will be times as large as 6 meters. Therefore, Jo walks meters every 3.6 seconds. Complete the following sentence by filling in the answer-boxes with numbers: Jo is 9 meters from her house when she has walked for 4 seconds. If Jo walks for an additional 3.6 seconds, then she will have traveled an additional meters. Therefore, 7.6 seconds after Jo started walking she is meters from her house.

Solution

a.) 0.25, 0.25, 1.5

b.) 0.9, 0.9, 5.4

c.) 5.4, 3.6