Answer:
90π units²
Step-by-step explanation:
(refer to attached)
Total Surface are off a right cylinder = area of its ends + area of curved surface
Given radius, r = 3 units and height, h = 12 units
Area of 2 ends,
= Area of 2 circles
= 2 x πr²
= 2π (3²)
= 2π (9)
=18π units²
Area of curved surface,
= 2πrh
= 2π(3)(12)
= 72π units²
Hence,
Surface area = 18π + 72π = 90π units²
Answer:
Step-by-step explanation:
It is given that the two figures are similar. This means that the ratio between the corresponding sides is equal. In essence, a side in the larger figure over its corresponding side in the smaller figure is equal to another side in the larger figure over its corresponding side in the smaller figure. Therefore, one can set up a proportion and solve to find the unknown side.
Substitute,
Simplify,
Inverse operations,
To find this question, you first should put your data values in order from least to greatest. Doing so would look like this:
3, 39, 39, 40, 46, 48, 60, 62, 62
Now find the median, the middle number. This would be 46. This would also be the middle point on your box and whisker plot. Looking at your answer choices, the only one that has the middle point at 46 is the last one. So that is your answer.
Answer:
<em>8 units</em>
Step-by-step explanation:
Given the relationship between the radius, r, of a sphere and its surface area, A expressed as;
r = 1/2( A /4 π )
We are to find the radius r when Area A is 64π
Substitute A = 64π into the expression and get r as shown;
Recall that: r = 1/2( A /4 π )
r = 1/2( 64 π/4 π )
r = 1/2(16)
r = 16/2
r = 8units
<em>Hence the radius of the sphere will be 8 units</em>