Answer:
0.70
Step-by-step explanation:
3.50/5 = 0.70
Keep in mind I've never actually attempted this kind of problem.
Calculate how far both planes are after 2.5 hours
450 × 2.5 = 1125
350 × 2.5 = 875
The legs of the triangle will be 1,125 miles & 875 miles.
1125² + 875² = 2,031,250

Plane A is 1,425 miles from Plane B.
Answer:
$300
Step-by-step explanation:
Here we are given:
Balance at the beginning of last cycle(first half) = $400
Balance halfway through the cycle(second half cycle) = $200
To find the amount Aaron's checking account pay interest last cycle, let's find the average balance.
Use the formula for average:

Average = $300
Therefore, the amount Aaron's checking account pay interest last cycle is $300
Answer: to avoid bias and to get a representative sample
Step-by-step explanation:
A random sample is useful for:
Avoid bias: if you have a selected sample, all of the selected individuals may have some common factor (same age group, same salary rage, same political ideology) so the sample may be kinda biased, this is something that you may want to avoid.
All the other options can not be ensured by any method, you survey, even with a random sample, may have no significant result, and you can not ensure that the surveyed people will answer truthfully.