Answer: 155 fifth grader students.
Step-by-step explanation:
Given that 80% = 124 fifth grader students, the difference between 80% and total number of fifth grader students is 100% - 80%, which is 20%.
Therefore, if 80/100 = 124
(100/100- 80/100) = x
We cross multiply:
0.8x = 0.2 x 124
0.8x = 24.8
Divide both sides by 0.8
x = 24.8/0.8
x = 31
Total number of fifth grader students is 124 + 31 = 155
Answer:
Step-by-step explanation:
The formula of an area of a square:
- side of a square
We have
Substitute:
METHOD 1:
Use
METHOD 2:
Use FOIL:
Answer:
a hourly rate is $10.40
b monthly income = 1788.80
Step-by-step explanation:
We need to make 21 630 per year
The question says a working year has 2080 hours
to find the hourly rate, take the salary and divide by the hours
21630/ 2080 hours = 10.40 per hour ( rounded to the nearest cent)
So the person will be making 10.40 per hour
There are 172 hours in a month
Salary = hours * rate
=172*10.40
=1788.80