Heron's formula is named after Hero of Alexendria, a Greek Engineer and Mathematician in 10 - 70 AD. You can use this formula to find the area of a triangle using the 3 side lengths.
Therefore, you do not have to rely on the formula for area that uses base and height. The picture below illustrates the general fro mu la where S represents the semi-perimeter of the triangle ,
For each 4 hour interval 800 bacteria grow. at 12 midnight there will be 16,400 bacteria.
Answer:
20%
Step-by-step explanation:
6.25 times 20% or 0.2 = 1.25. therefore she tipped the sever 20% of the total cost of her meal.
Answer:
y = 16
Step-by-step explanation:
Given that y varies directly as x then the equation relating them is
y = kx ← k is the constant of variation
To find k use the condition y = 48 when x = 6, thus
k = = = 8
y = 8x ← equation of variation
When x = 2, then
y = 8 × 2 = 16
Answer:
y=-1/2+5/2
Step-by-step explanation:
1. use point slope formula:
y-y1 = m(x-x1)
2. plug in values
y-(-1)=-1/2(x-3)
3. solve into y intercept form (y=mx+b)
y-1=-1/2x+3/2
y=-1/2+5/2