A species of dolphins is decreasing at a rate of 3.1% per year. if there are currently 20000 dolphins , many will there be in 30 years

7892 dolphins

Step-by-step explanation:

let P denote the dolphin population.

-Notice this is an exponential decay and is denoted as:

Where;

#Given t=30yrs, =20000 and r=3.1%, the population after 30 years is estimated as:

Hence, the dolphin population after 30yrs is approximately 7892

8y^50

step-by-step explanation:

complete the steps to find the area of the trapezoid.

area of rectangle = 256   square units

area of triangle 1 = 24  square units

area of triangle 2 = 16  square units

area of triangle 3 =   96 square units

area of trapezoid = 120  square units

step-by-step explanation: