X=9 this is the answer for question 19
Answer:The total amount of money that the school will spend for tickets is $9900
Step-by-step explanation:
Tickets to a baseball game are 20 dollars for an adult and 15 dollars for a student. A school bus tickets for 45 adults and 600 students. This means that the total amount spent by the school on adult tickets is 20 × 45 = $900
The total amount spent by the school on students tickets is 15 × 600 = $9000
The total amount of money that the school will spend for tickets will be the sum of the amount spent on adult tickets and student tickets. It becomes
900 + 9000 = $9900
Answer:
0.3745
Step-by-step explanation:
Data
mean (
): 80
standard deviation (
): 4
Normal distribution table is in figure attached
.
Z = (85 - 80)/4 = 1.25
Area below curve = 0.3944
Z = (82 - 80)/4 = 0.5
Area below curve = 0.0199
Proportion of exam scores between 82 and 85?
0.3944 - 0.0199 = 0.3745
