A formula for arc length, s, given the radius, r and central angle, Ф (in radians) is s = r × Ф.
s = 8 × 3 = 24 inches
We know that she spent $39, and has 3/4 of the original amount left. Our goal is to find the original amount. We can use the equation. x - 39 = 3/4x. Once we subtract x on the left hand side, we get -39 = -1/4x. Once we multiply -39 by -4, we get 146. She originally had $156.
$50 x .15% = $7.50
$50 - $7.50 = $42.50
$50 x .05% = $2.50
$42.50 + $2.50 = $45
Answer : $45
Note that:
I = 1, V = 5, X = 10, L = 50, C = 100
XX = 20, II = 2
20 + 2 = 22
XXII = 22
Find the number on the next page (pg.23)
23 = XXIII
XXIII is your answer
hope this helps
An aritmetic sequcne is represented as

where
an=nth term
a1=first term
d=common differnce, or how much each term increases by
n=which term
example
1,3,5, etc
first term is 1
common difference is 2 because it increases by 2 each time
so the formula would be

if we had
5,3,1
first term s 5
common difference is -2 since it goes up by -2 each time
so formula is

hope this helps