Answer:
Perimeter = 180
Area = 1080
Step-by-step explanation:
Perimeter is length of all sides added together. 30+78+72 = 180
Area is the length times the height/2 for a triangle. 30*72/2 = 1080
I hope this helped <3
Answer:

Step-by-step explanation:
Given that,
The radius of the sphere, r = 8 mm
We need to find the volume of the sphere. The formula for the volume of a sphere is given by :

Put all the values,

So, the volume of the sphere is equal to
.
The correct answer for the giving question it number 4
Answer:
See below
Step-by-step explanation:
By observation, the line tilts down to the left....negative slope
pick two convenient points, say 0,7 and 2,6
slope = rise/run rise = -1 run = 2
= -1/2
y-axis intercept is 7
y = -1/2 x + 7 That's it .....