Answer:
4.9 x 10^-4 is the scientific notation
Move the decimal 4 places from left to right
Answer:

Step-by-step explanation:

Use one of the many Trigonometric ratios to solve for the missing angle and then use Pythagorean theorem to solve for the missing side.
These things can be done in any order.
Answer:
<h3>
B(7, 3)</h3>
Step-by-step explanation:
Point P(5, -1) being the midpoint of AB means that 

and 

Answer:
and example hope it helps