351,875 - 101,949 = 249,926
351,875 + 249,926 = 601,801
A (15.4-8.1=7.3) has two significant figure so A is the ANSWER
while the all other options has 3 significant figure
Answer:
Point D: 
<em>d</em> = √41
General Formulas and Concepts:
<u>Pre-Algebra</u>
Order of Operations: BPEMDAS
- Brackets
- Parenthesis
- Exponents
- Multiplication
- Division
- Addition
- Subtraction
<u>Pre-Calculus</u>
- Midpoint Formula [3D]:

- Distance Formula [3D]:

Step-by-step explanation:
<u>Step 1: Define</u>
Point A(1, 2, -1)
Point B(-3, -6, 2)
Point C(3, -2, 0)
<u>Step 2: Find Point D</u>
Simply plug in your coordinates B and C into the midpoint formula to find midpoint
- Substitute [MF]:

- Add/Subtract:

- Divide:

<u>Step 3: Find distance </u><em><u>d</u></em>
Simply plug in the 2 coordinates A and D into the distance formula to find distance <em>d</em>
- Substitute [DF]:

- Subtract/Add:

- Exponents:

- Add:

Every year, the price of the smartphone is the
of the price of the previous year (since we lose the
, we remain with the
).
Since
can be written as
, the price after one year will be

After two years, the price is the
of the price after one year:

And so on: after three years we have

So, the answer is somewhere between three and four years.