a) Given:
Normal cost of phone = $425
Percentage discount = 30% = 0.30
To find the current sale of the phone, we have:
[tex]\begin{gathered} \text{Sale = 425-(0.3}\times425) \\ Sale=425(1-0.3) \\ \text{Sale}=425(0.7)=297.5 \end{gathered}[/tex]Therefore, the sale price of the phone is $297.50
b) Given:
Percentage of students absent = 15% = 0.15
Total number of students = 920
To find the number of students in attendance, we have:
[tex]\begin{gathered} \text{Number in attendance = 920 - (0.15}\times920) \\ \\ \text{Number in attendance= 920(1 - 0.15)} \\ \\ \text{Number in attendance = 920(0.85)=920}\times0.85=782 \end{gathered}[/tex]Therefore, the number of students in attendance is 782 students.
ANSWER:
a) $297.50
b) 782 students
