To find avg downstream is 39/3 = 13 mph
upstream is 20/4 = 5mph
the average of the 2 is the still water speed which is 8 mph
Answer:
9.16
Step-by-step explanation:
You have to make 1% into a fraction, which is 0.01. and then you just multiply 0.01 times 916.
Answer: 925
Step-by-step explanation:
This is an arithmetic series with first term 1 and last term 3(25)-2=73, with a total of 25 terms.
Using the sum of an arithmetic series formula, we get the sum is:
Answer:
1.2*a=180
a=180/1.2
a=150 cm
Step-by-step explanation:
Answer:
417.
Step-by-step explanation:
The multiplier is 1.0925.
After 3 hours the population is 320 * 1.0925^3
= 417.27