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.

Abiologist is recording the loss of fish in a pond. he notes the number of fish, f, in the pond on june 1. on july 1 there were 63 fish in the pond, which is 52 fewer fish than were in the pond on june 1. which equation represents this situation? a. f – 52 = 63 b. f – 63 = 52 c. 63 – f = 52 d. f – 63 = –52

Which expression is equivalent to7_/x^2 ÷ 5_/y^3? assume y# 0

Three baby penguins and their father were sitting on an iceberg 0.50.50, point, 5 meters above the surface of the water. the father dove down 4.74.74, point, 7 meters from the iceberg into the water to catch dinner for his kids. what is the father penguin's position relative to the surface of the water?