Which of the following describes the x-coordinates of the points on the curve cos x = e^y in the xy-plane where the curve has a horizontal tangent line?​

[15 points]find the quotient with the restrictions. (x^2 - 2x - 3) (x^2 + 4x + 3) ÷ (x^2 + 2x - 8) (x^2 + 6x + 8)

Andy wants to find the distance d across a river. he located points as shown in the figure, then use similar triangles to find that d = 223.5 feet. how can you tell without calculating that he must be wrong? tell what you think he did wrong and correct his error. round your answer to the nearest tenth if necessary. andy must have used the wrong . the distance d is actually feet.

Mrs. piazza invested 8000 in a certificate of deposit that pays 3% simple interest for 4 years. how much will be in mrs. piazza's account at the end of 4 years