Antonio is on the race track team. he ran the 400-meter dash in 1 minute and 20 seconds. the graph shows his performance on the 400-meter hurdles. how much faster was his average speed in the 400-meter dash?

1,589.63 in.^3

step-by-step explanation:

i hope this you : d

c.

step-by-step explanation:

she should of added 9^2 and 12^2. that is because it is a^2+b^2=c^2. c^2 is the hypotenuse and should always be bigger than the other two numbers. which is why she should of added 9 squared and 12 squared together instead of 15 squared.

there is nothing below so i cannot

step-by-step explanation:

4

step-by-step explanation:

im pretty sure it's 4 beacsue 8/2 equals 4