Thomas leaves Killough at 4:28pm as he walks to the home 2 km away. He stops by Joshua’s house on the way and plays the Xbox for 40 minutes. He arrived at home at 6:28pm. What was Thomas' total average speed for his walk home from school?

Average speed of Tomas for his walk home from school was 1.2 km/hr.

Step-by-step explanation:

Given:

Total Distance from school to home = 2 km

time at which he left Killough = 4:28 pm

time he reached home = 6:48 pm

Time interval he played X box at Joshua's house =40 mins.

We need to find the total average speed for his walk home from school.

Solution:

Time Spent on Journey

4:28 pm + 6:48 pm = 2 hours and 20 mins.

Time played X box at Joshua's house = 40 minutes.

So we will reduce the time played X box at Joshua's house from the time spent on Journey.

2 hours and 20 mins - 40 mins = 1 hour and 40 mins.

40 mins =

1 hours and 40 mins  =

Hence Total Time spent on journey = 1.67 hrs.

Distance traveled = 2 Km

Now we know that Average Speed is equal to Total Distance divided by Total time taken to travel the distance.

framing in equation form we get;

Average speed =

Hence Average speed of Tomas for his walk home from school was 1.2 km/hr.

i think it is c, not positive though

step-by-step explanation:

the largest number of the four options is 1.8 x 10-2

you have it in scientific notation.

1.80 x 10-6   = 0.00000180

1.80 x 10-4   = 0.000180 (bigger, or "less small", than the former one)

so

1.8 x 10-2       = 0.0180. as you see. the "less small", or the biggest one of them all.

as you have negative exponent, it means you are dividing 1.8 by 100 (i.e. moving the dot towards left, two times).

if you had positive exponent for the scientific notation, power of tenths, you would be multiplying times 100 (moving the dot towards right) as below:

1.8 x (10)2 = 180

so. if you have negative exponent in scientific notation, move the dot toward left. if it is positive, toward right as many times the exponent tells you.