In a test of physical fitness, a group of men ages 65 and older from a local retirement community were told to do as many sit-ups as they could. it is known the population mean μ is 20 with σ^x-8. the scores for the men from the retirement community are given below. what is the sample mean?
24 25 10 23 18 29 47 32
19 24 20 28 21 20 27 25

a. 1.25
b. 4.00
c. 0.5
d. 2.00

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.

central angle of a triangle has the same measure as its intercepted arc.

step-by-step explanation:

the answer is x=45 because i said so