help pls Mr. Gonzalez ran a marathon in 4hr. 25 min. How many seconds did it take for him to run the full marathon?!?!

15,900 seconds

Step-by-step explanation:

4 hr = 240 minutes. Add 240 minutes to the pre existent 25 minute so now you have 265 minutes in total. Multiply 265 by 60, and you get 15,900 seconds.

15900 seconds

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.