Answer:
It may not be right but try D.
Step-by-step explanation:
Answer:

Step-by-step explanation:

Answer:
I think its 12.3 years
Step-by-step explanation:
a fifth of 775 is 155 and 155 x 12.3 = 1850
You can estimate 3.9 times 5.3 to 4 times 5 which is 20
so if the answer is around 20, you know that you will have exactly 2 digits before the decimal place
Answer:
and f as shown below.
Use these lengths to find cosx, sinx, and tanx.
Step-by-step explanation: