This is all about operations priority! We have to perform the operations in the right order, remembering that parentheses come first, then powers, then multiplications and then additions:
Start with

Perform the operations inside parenthesis first:

Perform the square:

Perform the product:

Perform the sum:

Note: you have an extra parenthesis at the end, and none of the options meets the result. I'm afraid that there's a typo in the question, but this should still give you a valid strategy to solve the actual exercise.
Answer:

Step-by-step explanation:
Fro the graph, the first three terms of the sequence are 80,20,5,...
This is a geometric sequence with first term

The common ratio is

The function is given by

We substitute the values we got from the graph into this formula to get:

The correct answer is A
Answer:
2.02 i think
Step-by-step explanation:
Answer:
127.53 liters left after 10 minutes
Step-by-step explanation:
Let


Given
--- initial
--- the amount left, after 5 minutes
Required
--- amount left after 5 minutes
To do this, we make use of:

implies that:

Divide both sides by 200

Take natural logarithm of both sides



So, we have:

Divide by 5

So, the function is:


The amount after 10 minutes is:



Answer:
I think 7/3 or 2 1/3? sorry if wrong
Step-by-step explanation: