Last summers, students who worked earned an average of $80 a week with a standard deviation of $12. What percentage of students
1 answer:
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Answer:
30 is 20% of 150 i.e. 20% of total 150 students in the marching bank play the trumpet.
Step-by-step explanation:
Draw two number lines:
- One number line to represent number of students from 0 to 150. For convenience, divide the number line into intervals of 15 so that 30 is also present on the line.
- Second number line to represent percentage and divide it in intervals from 1 to 100.
Now, place the other number line just below the other number line and draw a vertical line as shown the attached figure.
We find out that 30 is at 20% of 150.
It means that 20% (30 of total 150) of total 150 students in the marching band, play trumpet.
Answer:
n=4 because we have a quarterly rate
After replace the values given we got:
If we round this answer to the nearest number we got approximately $598 after 5 years.
Step-by-step explanation:
For this case we can ue the compund interest formula for the future value given by:
Where P represent the initial amount , t the number of years and r the rate of interest on fraction. The value of n represent the number of times that the interest rate is compound in a year
For our case we have:
n=4 because we have a quarterly rate
After replace the values given we got:
If we round this answer to the nearest number we got approximately $598 after 5 years.
Answer:
$8.
Step-by-step explanation:
See attached picture.
