The escape speed from a very small asteroid is only 18 m/s. If you throw a rock away from the asteroid at a speed of 25 m/s, what will be its final speed?

Alex’s printer can print 8 photos in 12 minutes.

Khalil’s printer can print 24 photos in 1 hour.

Select all the processes you could use to help determine how much longer it will take Khalil’s printer to print 120 photos than Alex’s.

Write an equation that adds the number of photos that each printer prints in 1 hour.

Make a table of equal ratios to find how long it takes each printer to print 120 photos and find the difference.

Subtract the number of photos that Khalil's printer prints in 2 hours from the number of photos that Alex's printer prints in 2 hours.

Graph a table of values for each printer and compare the number of minutes when the number of photos is 120.

Multiply each ratio by 120, then subtract the results.

Explanation:

if the person is shown to have +90n, then ans is -10n.

if the person is shown to have -90n, then ans is +10n.

it is given that trillions of microbes make up to 1% to 3% of the body mass.

let's take average of this percentage: 2%

consider the average mass of the human body as 70 kg.

then, trillions of microbes would have mass  

therefore, 100 trillion micro-organisms would weigh:

this is an approximate value and could change depending on the mass of the human body and percentage of the microbes present in it.

average mass per microorganism =