Mathematics, 15.11.2019 23:31 rqg001e
Awhispering chamber is an elliptically arched chamber. a unique feature of a whispering chamber is that when a person standing at one focus of the ellipse whispers, he can be heard by a person standing at the other focus, regardless of the dimensions of the ellipse from which the dome is built.
suppose that the dimensions of the ellipse used to create a whispering dome is 200 feet by 380 feet. walter stands at one focus, and barbara stands at the other focus.
how far apart are walter and barbara?
enter your answer, rounded to the nearest tenth of a foot, in the box.
Answers: 2
Mathematics, 21.06.2019 19:50, Roshaan8039
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) = .
Answers: 3
Mathematics, 21.06.2019 20:00, cduke1919
The boiling point of water at an elevation of 0 feet is 212 degrees fahrenheit (°f). for every 1,000 feet of increase in elevation, the boiling point of water decreases by about 2°f. which of the following represents this relationship if b is the boiling point of water at an elevation of e thousand feet? a) e = 2b - 212 b) b = 2e - 212 c) e = -2b + 212 d) b = -2e + 212
Answers: 1
Mathematics, 22.06.2019 00:00, kotetravels10
Fill in the blank 1. a rhombus is a rectangle a) always b) sometimes c) never 2. a square is a quadrilateral a) always b) sometimes c) never 3. a trapezoid is a kite a) always b) sometimes c) never 4. a quadrilateral is a kite a) always b) sometimes c) never 5. a square is a rhombus a) always b) sometimes c) never 6. a parallelogram is a rectangle a) always b) sometimes c) never
Answers: 1
Awhispering chamber is an elliptically arched chamber. a unique feature of a whispering chamber is t...
Mathematics, 13.03.2021 07:00
Social Studies, 13.03.2021 07:00
Spanish, 13.03.2021 07:00
Mathematics, 13.03.2021 07:00
History, 13.03.2021 07:00
Health, 13.03.2021 07:00
Biology, 13.03.2021 07:00