Answer:
9>x>−1
Step-by-step explanation: Brian list?
O 8
O 14
0.16
Answer:
2
Step-by-step explanation:
Since the absolute value of -8 is 8, and the absolute value os 6 is 6, we can
do 8-6=2.
Question:
A boy makes a cone of diameter 28 cm without a base. He then cuts a smaller cone of diameter 20 cm from the cone. He used the bottom part as a lampshade. If the height of the lampshade is 11cm,
(a) find the volume of the whole cone.
(b) find in cm2, the area of the material used to make the lampshade.
Answer:
(a) V ≈ 16420.1
(b) A ≈ 2690.1 cm²
Step-by-step explanation:
Solution for (a)
Formula: The formula for the volume of a cone is V = 1/3 hπr².
V= πr² h/3 = π × 28/ 2 × 20/ 3 ≈ 16420.0576
16420.0576 in nearest tenths is 16420.1
Therefore, the volume of the whole cone is 16420.1 cm²
Solution for (b)
Formula: A = πrl + πr2.
l = r² + h²
Solving for A
A = πr (r + h²+ r²) = π × 20 × (20 + 112 + 202) ≈ 2690.80077
2690.80077 In nearest tenths, is 2690.1
Therefore, the area of the material used to make the lampshade is 2690.1 cm²
Step-by-step explanation:
We are provided with an equation and are required to give reasons on how we got the final answer.
(1.) The equation is -3(2x-3) = 25-8x is given.
(2.) In this step, we have simplified the left hand side of the equation by opening the bracket i.e. -6x+9 = 25-8x
(3.) Here, the terms containing 'x' are brought to the left hand side of the equation and simplified i.e. 2x+9 = 25
(4.) Now, the constant terms of the equation are brought to the right side of the equation and simplified i.e. 2x = 16.
(5.) Lastly, the whole equation is divided by 2 in order to get the value of 'x' i.e. x = 8.
B.b= 4 2/7
C. b = 8 2/7
D. b = 8 4/7