Area by Heron's formula:
semiperimeter = (15 + 20 + 25)/2 = 60/2 = 30 cm

The formula of the area of a triangle: Area = 1/2 * base * height
1/2 * 25 * height = 150
12.5 * height = 150
height = 150/12.5
height = 12 cm
check the template in the picture below.

Answer:
1/2
Step-by-step explanation:
The Rational Root Theorem says that any rational root has
1. a numerator that is a factor of the constant term
2. a denominator that is a factor of the leading coefficient (that's attached to the highest-power term)
Numerator: 
Denominator: 
That means there are only two possible rational roots: 
Try them both by plugging them into the polynomial.

Aha! The negative one-half value does not produce 0
I THINK the answer is 5 I'm really sorry if I'm wrong
The Range of the data set is (B) Number 68