There were 200,00 animals of a certain species in 1980. since then, this number has decreased by 4.5% each year. approximately how many animals of this species will be left in 2025?

Step-by-step explanation:

The number of animals of a certain species in 1980 = 20000

The rate of decrease each year = 4.5 %

The number of animals left in 2025 = ???

The number of years between 1980 and 2025 = 45

By formula of depreciation,

where Pn is the population in 2025

P is the population in 1980

R is the rate of decrease in population

Substituting the values in the equation, we get

=

=2518.7 = 2519 species.

3/4 ÷ 3/4

step-by-step explanation:

basically divide any proper fraction with itself to fit the criteria.

so if we are using 3/4, then:

3/4 ÷ 3/4 = 1

so 1 is the quotient.

and the numerators for both these fractions is 3.   and if we divide the numerators:

3 ÷ 3 = 1

we see that quotient is equal to our original quotient as well.

180-142=38 for the acute angle next to the entry

90+38=128

180-128=52

a=52

step-by-step explanation: