Alek went for a walk. D(t) models the distance Alek walked (in kilometers) after t hours. What does the statement D(0.5)<D(1)-D(0.5)mean? Choose 1 answer:

Question

i dont get if it means that the time he walked in the half hour is less than the time he walked in the hour? how would i do this? please help i dont understand , thanks vivy lola

Answer 1

You didn't give us the list of answers to choose from, but here's what it means.

1. D(0.5) is the distance Alek walked in the first half hour
2. D(1) is the distance Alek walked in the first hour
3. D(1) - D(0.5) is the distance Alek walked in the second half hour.

So D(0.5) < D(1) - D(0.5) means the distance Alek walked in the first half hour is less than the distance he walked in the second half hour. So he walked a bit faster in the second half hour than he did in the first half hour.

Example:

D(0.5) = 2 km

D(1) = 5 km

D(1)-D(0.5) = 5 - 2 = 3 km

So Alek walked 2 km in the first half hour and 3 km in the second, totaling 2+3=5 km for the hour