For this case what you need to know is that the formula for the total surface area of a straight cone is
S.A = πrl + π r ^ 2
Substituting the values we have:
S.A = (3.14) * (7.9) * (3.7) + (3.14) * (7.9) ^ 2
S.A = 287.7496 cm ^ 2
Answer:
the surface area of a cone is
D) 288 cm ^ 2
Answer:
36/72
Step-by-step explanation:
Answer:
1):Reaction
2):Action
3):Thought
4): Dialogue
Step-by-step explanation:
Answer:
2+i or 2-i (D)
Step-by-step explanation:
First you use the quadratic formula. X= (-b +/-
)/2a
a=1
b=-4
c=5
X= (4 +/-
)/2
X=(4 +/-
)/2
The square root of -4 is 2i. i=√-1. Therefore 2i= 2√-1 .If you simplify that, it becomes √-4i.
X= (4+/- 2i)/2
X= 2+/-i
X= 2+i or 2-i
Answer:
J. The equation has one real solution and two complex solutions.
Step-by-step explanation:
Complex solutions come in pairs, so there can only be an even number of them. So we can rule out G, H, and K.
To find the other roots, we can factor using either long division or grouping. To use long division, see the attached picture. To use grouping:
3x³ − 4x² + x − 10 = 0
3x³ − 6x² + 2x² + x − 10 = 0
3x² (x − 2) + (2x + 5) (x − 2) = 0
(x − 2) (3x² + 2x + 5) = 0
The other factor is 3x² + 2x + 5. The discriminant of this is (2)² − 4(3)(5) = -56. Since the discriminant is negative, the roots are complex.