Answer:
A=40, B=60, C=80
Step-by-step explanation:
180/7 to find what "1" would be in the ratio then multiply 20*2, 20*3, 20*4.
Answer:

Step-by-step explanation:
Given expression:

Substitute

into the expression:

Answer:
114.31 nautical miles per day
Step-by-step explanation:
Use formula

where S is the distance, t is time and v is rate.
If S=11431 nautical miles and t=100 days, then

Answer:
The half life of the car is 3.98 years.
Step-by-step explanation:
The value of the car after t years is given by the following equation:

In which V(0) is the initial value and r is the constant decay rate, as a decimal.
The value of a certain car decreases by 16% each year.
This means that 
So



What is the 1⁄2-life of the car?
This is t for which V(t) = 0.5V(0). So







The half life of the car is 3.98 years.
2y + 4 + 5y + 8=
7y + 4 + 8=
7y + 12=