Answer:
D.$315
Step-by-step explanation:
$450=100%
100%-20%-10%=70%
$450×70%=$450×70/100
=$315
It's 3.
3‚354‚107
..................
Answer:
13
Step-by-step explanation:

Hope this helps!
5x^2= 2205
Divide both sides by 5
x^2=441
Find the square root of both sides
x= 21
Answer:
3306.5
Step-by-step explanation: