There is a drought and the oak tree population is decreasing at the rate of 6% per year. if the population continues to decrease at the same rate, how long will it take for the population to be a third of what it is? if necessary, round your answer to the nearest tenth. the population will reach a third of its original value in approximately years

17.8 years

Step-by-step explanation:

To find the population in a future year, use the formula:

where A is the amount, p is the starting population, r is 6% or 0.06, and t is the number of years.

Since the population is decreasing it is subtraction. Here we are finding t, A=1 P =3, and r=0.06.

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

1/3 + 1/3 ≠ 2/6 because 1/3 alone = 2/6  

step by step explanation:

1/3 + 1/3 = 2/3       2/3=4/6