This is a geometric sequence, so use the formula for the sum of a geometric sequence:
Sum = (a(r^n - 1))/(r - 1)
where a is the first term, -5
r is the common ratio, 5
and n is the number of terms
Thus,
Sum = ((-5)(5^6 - 1))/(5-1) = -19530
The plants used 17440 Calories of energy.
-9-6+12h+40=22
12h+25=22
12h=-23
h=-23/12
18,000
just use a calculator bro
Answer: 
Step-by-step explanation:
Given
Cost per student in the year 1978 is $2200
The cost increases to $10,300 in 2008
Suppose
is the linear equation defining the cost per student after x years
Substitute the value for 1978

After 30 years it becomes

Thus, the linear equation becomes
