Can someone please help me work this out thanks

1. 50.24m^2

2. 132.67cm^2

Step-by-step explanation:

1. Area of a circle =π r^2

π =3.14

r= 4m r^2=16m^2

Area=3.14*16

=50.24m^2

2.Area of quarter circle=π r^2/4

r=13cm r^2=169cm^2

Area=3.14*169/4

=132.67cm^2

answer: your answer is c

step-by-step explanation:

delaney would like to make a 5lb nut mixture that is 60% peanuts and 40% almonds.

she has several pounds of peanuts and several pounds of a mixture that is 20% peanuts and 80% almonds.

let 'p' represent the number of pounds of peanuts needed to make the new mixture, and  

let 'm' represent the number of pounds of the 80% almond-20% peanut mixture.

:

p + m = 5

therefore

m = (5-p)

write an equation based on the percent of peanuts

1p + .2m = .6(5)

replace m with (5-p)

p + .2(5-p) = .6(5)

p + 1 - .2p = 3

p - .2p = 3 - 1

.8p = 2

p = 2/.8

p = 2.5 lbs of peanuts required

then

5 - 2.5 = 2.5 lbs of the peanut/almond mixture required

:

a) what is the system that models this situation?

p + m = 5

1p + .2m = .6(5)