John ran the 100 m dash with a time of 9.88 sec . if this pace could be maintained for an entire 26 mi marathon , what would his time be ?

approximately 72.35 minutes

Step-by-step explanation:

there are 1609.344 meters in a mile

john ran 100 meter - which would be 16.09 per mile

9.88 seconds x 16.9 = 166.97 seconds per mile

166.97 seconds x 26 miles = 4341.22 seconds

4341.22 seconds / 60 = 72.35 minutes

linearly: 8560 bacteria

exponentially: approximately 75233 bacteria

step-by-step explanation:

assuming it is not exponential (we would have some really complicated logarithms), let's say it is linear. then, after 5 hours, it increased by 1200 bacteria, so every hour it increases by 240 bacteria. this means that after 19 hours, we get 19 * 240 + 4000 bacteria or 3800 + 760 + 4000 = 7800 + 760 = 8560 bacteria.

because it says round your answer, i will do this exponentially (with a calculator, of course). first, we need to find how much it multiplies by every hour, by taking the 5th root of 52/40 or 13/10. this is approximately 0.167. we still need to add 1 to this, because we are multiplying by that number, not adding that amount of the number. now, we just calculate 4000 * (1.167)^19. use a calculator to get approximately 75232.6, or 75233.

50 min

step-by-step explanation:

they will be decreasing both their times in half

60 / 2 = 30

40/2 = 20

30 + 20 = 50