Which recursive function describes the number of bacteria observed at the 7th hour?

What is the length of the missing leg in this right triangle? 18 mm 24 mm 26 mm 32 mm

Look at this pattern ; 1,4,9, number 10000 belongs in this pattern . what’s the place of this number?

Ahiker stands at an unknown elevation before he ascends 2 miles up a mountain to an elevation of 9 miles. find the elevation of the hiker before his ascent.