1. The circumference of a circle is 587 cm. Find the diameter (D), the radius (r), and the length of an arc (a) with measure of 140°.
A. D: 116 cm; r: 29 cm; a: 1601 cm
B. D: 58 cm; r: 29 cm; a: 22.67 cm
C. D: 29 cm; r: 58 cm; a: 11.37 cm
D. D: 58 cm; r: 116 cm; a: 11.31 cm

the answer is b.

step-by-step explanation:

by the trigonometric ratio tangent, tangent equals opposite divided by adjacent.

therefore, tan(50) equals ac/3

multiply each side by 3 to get: ac=3tan(50)

the answer is b.

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

5.7622

step-by-step explanation:

the ten thousandths place is the 2. you round it up if, that number in whatever place is 5 or higher.