Help me please I don't get it

9514 1404 393

  C = 56.52 in

  A = 256.34 in²

Step-by-step explanation:

The figure is trying to show you that d=18 in, so r=9 in. The formulas for C and A are given, so you only need to put the numbers in the formula and do the arithmetic. Apparently, you're supposed to use 3.14 for π.

  C = πd = (3.14)(18 in) = 56.52 in

  A = πr² = (3.14)(9 in)² = (3.14)(81) in² = 254.34 in²

c.

step-by-step explanation:

substitution for (0,1)

y=x^2+4x+1

1=0^2+4(x)0+1

1=0+4(x)0+1

1=4(x)0+1

1=0+1

1=1

substitution for (-3,-2)

y=x+1

-2=-3+1

-2=-2