The population of a suburb is 4000 people. The population of the suburb is expected to double each decade. The expression 4000 • 2d models the

population of the suburb after each decade d.

Please Evaluate the expression for

d = –2.

1000

Step-by-step explanation:

The population of the suburb after each decade d is given by the equation as follows :

We need to evaluate the expression for d = -2.

Put d = -2 in the above equation. So,

So, if d = -2, then the population of the suburb is equal to 1000.

The solution is in the following image

The answer is in the image 

The answer is in the image 

The solution is given in the image below

The wood before starting =12 feet

Left wood=6 feet

Wood used till now=12-6=6 feet

Picture frame built till now= 6/(3/4)

=8 pieces

Therefore, till now 8 pieces have been made.

The answer is in the image 

30% of 420 are first year students

first year students = (30/100 )*420

=126 students

Student who are not in first year = 420-126

=294 students  

Given height of gymnasium is 5/6 height of 30 foot ball

therefore height of gymnasium=5/6 * 30

=25 feet