Recent studies have indicated that nicotine may suppress the growth of bone cells and may be associated with decreased calcium absorption in humans. Since bones act as calcium stores, long periods of insufficient calcium can lead to bone loss and the risk of developing osteoporosis. Postmenopausal women are a group that is particularly at risk because of their loss of estrogen following menopause. A study was conducted to compare bone mineral density of post-menopausal women who had smoked throughout their adult lives with non-smoking postmenopausal women. It was hypothesized that the smoking group would have lower bone density than the non-smoking group. Low bone density indicates porous and fragile bones and potentially osteoporosis. Assume that bone density is approximately normally distributed. Summary statistics from the study are given in the table below.

a revenue

step-by-step explanation:

a.) revenue   - income from selling goods and services

b.) assets - property owned by a person or company

c.) money - something traded for goods and services

d.) accounting- keeping of financial records

step-by-step explanation: so we look at the formula un = a + (n-1)d

un is the amount of seats

n is the nth term aka row number

a is the original sequence/row number

d is the difference between each term

so in this a=22 d=6 and n can remain as n because we are simply formjng a rule

lets put these in the equation

un=22+(n-1)(6)

this is your answer to part a

however

lets double check that this is correct, we'll try putting it into the second term

un=a+(n-1)d

u2=22+(2-1)(6)

u2=22+6

u2=28

as the question said the second row has 28 seats so now we know the formula we made is correct.

as for part b

un=a+(n-1)

its asking us to find a row with 100 seats.

remember un was the amount of seata so all we do is substitute this in.

un=100 a=22 d=6

un=a+(n-1)d

100=22+(n-1)(6)

so now we simplify to find n which is the row number.

100-22=22+(n-1)(6)-22

78=(n-1)(6)

78/6=(n-1)(6)/6

13=n-1

13+1=n-1+1

14=n

so now we know that in the 14th row there is 100 seats.

hope this and that you understood! its my first time using the app or anyone out on here : p its also me to revise so a bunch! ask more questions if you dont understand ☺

answer

step-by-step explanation:

i don't know

step-by-step explanation: