For y = 4 + cos 4(x + 4.7) state the (1) amplitude, (2) period, (3) vertical shift (positive or negative), and (4) phase displacement.
A. (1) 1, (2) , (3) 4. (4) -4.7
B. (1) 1, (2) 3. (3) 4. (4) -4.7
C. (1) 4 (2) 3. (3) 1, (4) -4.7
D. (1) 4. (2) 34, (3) 1. (4) -4.7

a) justify

step-by-step explanation:

justifying is just part of everyday life. justify kind of means proof so i think the answer is a) justify.

step-by-step explanation:

12: 00 p.m. to 7: 00 p.m. is a total of 7 hours.

4: 00 p.m. to 7: 00 p.m. is a total of 3 hours.

this means that from 4: 00 p.m to 7: 00 p.m. this represents 3/7 of what was lost from 12: 00 p.m. to 7: 00 p.m.

after knowing this, after doing 11,600 - 6,800 = 4,800

4,800 represents 3/7 of what was lost for 7 hours.

we then divide 4,800 by 3 which gets 1,600.

because we know that 1,600 represents 1/7 of how much water was lost, we just have to multiply by 7, which gets 11,200.   after adding 11,200 to how much water was left at 7: 00 p.m. which was 6,800. 11,200 + 6,800 = 18,000

this means that the pool originally had 18,000 gallons in the pool.

you can also check your work by doing 18,000 - 4(1600), which becomes           1800 - 6400 which gets you 11,600.

i would say b) is your answer

sorry if im wrong

step-by-step explanation: