Answer:
D
Step-by-step explanation:
complementary angle of 30°=60°
5n+20=60
5n=60-20
5n=40
n=40/5=8
Answer:

Step-by-step explanation:
0.3
^ You need to move the three before the decimal place and leave 4 empty digits (0) between
0.3
3.0
30.0
300.0
3000.0
30000.0
A total of 5 moves.
Each move is equivalent to x, the preceding value, times 10. x * 10
Repeated multiplication times the same factor equates to exponentiation, so for a total of 5 moves, it is notated as
, giving you an expression of:

Answer:
12.2
Step-by-step explanation:
By Pythagoras theorem:

He makes $45 per week.
He has $75.
Price of the phone minus what he has = $405.
Let w = the number of weeks he must work to buy the phone.
w = $405/$45
w = 9
Answer:
The correct answer is C.
Step-by-step explanation: