Echo Tech has introduced a new model of their camera phone. The number of sales of the phone x weeks after the beginning of the initial sales promotion is given by S(x)=50e0.12xx−50, 1≤x≤20. Find the rate of change of the company's sales 3 weeks after the beginning of the promotion. Round your answer.

Expresa commuter train leaves downtown sation and travels at a average speed of 55 miles per hour towards the north side sation, which is 50miles away. thirty minutes later, express commuter train #7 leaves north side and travels at a average speed of 35miles per hour towards downtown sation. at the moment the two trains pass each other, how far(in miles) is train #12 from the downtown sation and how long(in minutes) has the #12 train been traveling

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

Suppose your sat score is 2040. a college with an average sat score for admintted students of which of these would most likely be your best option?