Answer:
The right answers are: The sphere gets bigger/The diameter doubles/The surface area quadruples.
Step-by-step explanation:
From Geometry, we remember that surface area and volume of the sphere are represented by:
(1)
(2)
Where
is the radius of the sphere. The diameter is two times the radius of the sphere.
If the radius of the sphere is doubled, then the sphere gets bigger, the diameter is double, the surface area is doubled and the volume is octupled. Therefore, the right answers are: The sphere gets bigger/The diameter doubles/The surface area quadruples.
Answer: A
Step-by-step explanation:
For prisms, use the formula: 2B + Ph
B = base of figure, here it is the trapezoid.
The area of the trapezoid is (3+6)*4/2 = 18
P = perimeter of the base, which is 3+4+5+6 = 18
h = height, here it is 5.
Thus the answer is:
2*18 + 18*5 = 36 + 90 = 126 cm^2
(C)
Answer:
False
Step-by-step explanation:
If we were to flip the solid on the left so its parallel to the solid on the right, we would be able to compare the two more easier.
We can see that the right solid has dimensions of:
L = 1 cm
W = 3 cm
H = 5 cm
The left solid has dimensions of:
L = 1
W = 2
H = 7
If we were to add these all up, they would not equal.
R: 1 + 3 + 5 = 9
L: 1 + 2 + 7 = 10