Abrand of cereal had 1.2 mg of iron per serving. then they changed their recipe so they had 1.8 mg of iron per serving. what was the percent increase in iron?

The percent increase in the iron was 50%. 1.2/2 = .6     1.2 + .6 = 1.8

the figures below are made out of circles, semicircles, quarter … find the area and the perimeter of each figure and give your answers as a completely simplified exact value in terms of π (no approximations). remember that we'll also have to cut whatever areas we get in half, since we're only dealing im pretty sure that is the right answer

step-by-step explanation:

13

step-by-step explanation:

169-1=168

168-3=165

165-5=160

160-7=153

153-9=144

144-11=133

133-13=120

120-15=105

105-17=88

88-19=69

69-21=48

48-23=25

25-25=0

since it took 13times to completely subtract it hence its square root is 13