Net for the prism will have 3 rectangles with dimensions 5 by 15, 12 by 15 and 13 by 15 and 2 triangles with legs 5 inches and 12 inches.
The correct net is net a.
Surface area = sum of areas of the three rectangles and sum of the two triangles.
SA = (5 x 15) + (12 x 15) + (13 x 15) + (5 x 12) = 75 + 180 + 195 + 60 = 510 square inches.
Answer:
<em>A. 4×π×3²×</em><em />
Step-by-step explanation:
r = 3×10² = 3×100 = 300
×π×300³=
×π×27,000,000=
×π=
36,000,000π
Answers solved:
A. 36,000,000π
B. 108,000,000π
C. 3,600,000π
D. 32,400,000π
Multiply the price of a flash drive by the number he buys:
$12 x 24 = $288 total
The answer is 9. 5.2 • 9= 46.8
Answer:
The time will be 25 minutes in which snowball be completely melted.
Step-by-step explanation:
Given : The rate of change of the volume of a snowball that is melting is proportional to the surface area of the snowball. Suppose the snowball is perfectly spherical.
Then the volume (in centimeters cubed) of a ball of radius r centimeters is
The surface area is
Set up the differential equation for how r is changing. Then, suppose that at time t = 0 minutes, the radius is 10 centimeters. After 5 minutes, the radius is 8 centimeters.
To find : At what time t will the snowball be completely melted?
Solution :
Using given condition,
....(1)
Substitute in (1),
Now, t=0 , r=10
So,
i.e.
After 5 minutes, t=5 , r=8
The equation form is
The snowball be completely melted means radius became zero.
The time will be 25 minutes in which snowball be completely melted.