How would I use a logarithmic model (y = a + b ln x) for the information that is in the picture? X is the number of jackets so the 1000, 2000 3000 and so on and the Y can be either the price demand or the price supply.

Aswimming pool has an input pump for filling the pool and an output pump for emptying the pool. the input pump can fill the pool in 3 hours, and the output pump can drain the pool in 5 hours. as you go to bed, the pool is full, but a neighbor’s kid turns on the output pump. at midnight, you awake to find the pool half empty. immediately, you turn on the input pump, but you are sleepy and forget to turn off the output pump. at what time will the pool become full?

What is the compound interest in a three-year, $100,000 loan at a 10 percent annual interest rate a) 10.00 b) 21.00 c) 33.10 d) 46.41

Olga bought a new skirt that cost $20. sales tax is 5%. how much did olga pay, including sales tax? 7.