Answer:
The last option
Step-by-step explanation:
To find a percentage of something you need

The expected is correct marks, the total is the total amount - then you multiply by 100 to turn the decimal into a percentage.
Answer:
Self-control
Why:
Most people would feel pressured to respond to an email, you are showing self-control by resisting the urge.
Answer:
308.5 lol
Step-by-step explanation:
Write a system of equations and solve.
x + y = 10
5x + 10y = 90
Multiply and combine equations
-5x - 5y = -50
5x + 10y = 90
------------------
5y = 40
y = 8
x = 2
There are 2 nickels and 8 dimes in the jar. Hope this helps! :)
Answer is C.
The sample is selected at tandon from the population, but it was done on a particular day of the week. So the sample is not random.
More data should be taken, distributed on every day of the week, probably in different months.