1.which fraction is the ratio expressed in simplest form? 24: 18 a. 12/9 b.8/6 c.4/3 d.6/1 2.the ratio of two numbers is 1 to 4 and the sum of the numbers is 45 what is the smallest number? a.10 b.9 c.8 d.7 3.what is 490% written as a decimal? a. 4.9 b.49 c. 4900 d. 0.0049 4. what is 0.5% written as a decimal? a.0.5 b.00.5 c.0.25 d. 0.005

1.  divide each number by 6 and you get 4:3  answer c

2. 1x+4x=45  (the ratios give you how many of each you have)

5x=45  so x=9  that is the smallest number

3.  percent means out of 100  so 490/100  4.9

4  percent means out of 100  so .5/100  5/1000  = .005

circle area = pi * radius^2

if diameter = 10 then radius = 5

circle area = pi * 5^2

circle area = pi * 25

circle area = 78.5398163397 square units

step-by-step explanation: