A store sold 725 scooters in one year. The next year the store sold 579 scooters. The third year the store sold 696 scooters. In year 4, the store sold 112% of the total scooters sold in the previous year combined. Determined the number of scooters sold in year 4.

Write the fraction 9/50 as a decimal if needed round to the nearest hundredth

The number of fish in a lake can be modeled by the exponential regression equation y=14.08 x 2.08^x where x represents the year

Prove (a) cosh2(x) − sinh2(x) = 1 and (b) 1 − tanh 2(x) = sech 2(x). solution (a) cosh2(x) − sinh2(x) = ex + e−x 2 2 − 2 = e2x + 2 + e−2x 4 − = 4 = . (b) we start with the identity proved in part (a): cosh2(x) − sinh2(x) = 1. if we divide both sides by cosh2(x), we get 1 − sinh2(x) cosh2(x) = 1 or 1 − tanh 2(x) = .