3. Determine whether the following scenarios are Area or Circumference: a. How many framed pictures of art can fit on a wall
b. The distance around a circular swimming
c. How many turns of a bike wheel to go one block
d. How much paint is needed to paint a wall

a) area

b) circumference

c) circumference

d) area

Step-by-step explanation:

when thinking about covering a surface, think area

when thinking about revolutions of a wheel, or distance around, think circumference

A and D are area, and C and D are circumference.

A is talking about how much can fit “in” a wall. This is area.

The distance around something is circumference.

C is how many times the wheel can turn, but measuring the area of the wheel can’t figure that out. This is circumference.

You wouldn’t paint only the perimeter of the wall. This has to be area.

Comment any questions down below.

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 ☺