Answer:
y = 3
+ 4
Step-by-step explanation:
Create 2 equations using values from the table to find a and b.
Using (0, 10), then
10 = acos0° + b ( cos0° = 1 ), thus
a + b = 10 → (1)
Using (90, 4), then
4 = acos90° + b ( cos90° = 0 ), thus
b = 4
Substitute b = 4 into (1)
a + 4 = 10 ( subtract 4 from both sides )
a = 6
Thus
y = 6cosx° + 4
When x = 45°, then
y = 6cos45° + 4 = 6 × 
+ 4 = 3 + 4
I really don’t know but I think I got it wrong
Answer: RW I think.
Step-by-step explanation:
Answer:
280 students
78260 minutes
307.45 minutes per day
Step-by-step explanation:
A We multiply the total number of students by the fraction that are high schoolers to determine the total number of high schoolers
700 * 2/5 = 280
There are 280 high schoolers
B The total time high schoolers spend in school is the time 1 student spends in school times the number of students
279.5 * 280 =78260 minutes
C The high schoolers spends 279.5 minutes in class
10% = .1
We need to add 10% to this time
279.5 * 10%
279.5 * .1 = 27.95
Add this because they spend 10% more time
279.5 + 27.95 =307.45 minutes
