Determine what type of model best fits the given situation a population of wolves is presently at 500 and is decreasing by 10% each year.

a. quadratic
b. exponential
c. linear
d. none of these

B. Exponential

Step-by-step explanation:

The annual wolf population in each year is

w  =  500  500(0.9) 500(0.9)²  500(0.9)³   …

n =      1           2             3                4            …

The model is w = 500(0.9)ⁿ⁻¹.

This is an exponential model, because the independent variable is in an exponent.

rick has $1400 and sally has $1500

step-by-step explanation:

to find amount of money rick has after 10 years :

principal = $1000 , time = 10 years , rate = 4% annually

to find amount of money sally has after 10 years :

her friend gives to pay her $50 per year, therefore money she has after 10 years = 50 × 10 = $500

also, sally gets $1000 after 10 years,

therefore, total amount of money sally has after 10 years = 500 + 1000 = $1500

so, after 10 years : rick has $1400 and sally has $1500