A store has 4 bins of planet posters with 23 posters In each bin. It has 3 bins of planet calendars with 26 calendars in each bin yesterday 72 calendars were sold how many planet posters and calendars are left in all? Explain how you found your answer and how you know if your answer is reasonable

Martha needs 22.25 strawberries for every 5 smoothies she makes. complete the table to see how many strawberries she would need to make 10 smoothies and 20 smoothies.

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) = .

Can anyone explain to me how to do this? anything will .