First find the area of the triangle (on top) and then subtract the area of the circle (on bottom) since the triangle is Equilateral, you can assume that the height can be found by using the 30 60 90 angle relationship. To find the radius of the circle, divide the height by 2.
No, to find the least number of burgers and buns, you should find out the LCM of 15 and 6, not their product.
LCM = 30,
so they need to buy atleast 30 of each item.
We have the sum of cubes identity
and observing that 1 + 4 = 2 + 3, we have
and
Then
Alternatively, we have the well-known sum of cubes formula
The sum under the square root is this sum with 
. Then
and so the square root again reduces to 15.
35 because you can not multiply both numbers by the same number to get a smaller Greatest common multiple
60x24=1,440
103,680/1,440=72 beats per minute
an average human heart beats 72 to 80 beats per minute
