Answer:
When you add variables with exponents, you do not add the exponents together.
The error -> 
In this case, they have added the exponent 
.
However, you do not add it. Instead, the answer should be 
Answer:
It will take 8 hours
Step-by-step explanation:
Answer:
Irrational number
Step-by-step explanation:
A irrational number is when the numbers cannot be written as a quotient of two integers.
Answer:
<u>84 m²</u>
Step-by-step explanation:
Solving : (Formula mentioned in question)
Finding area of base using Heron's Formula :
⇒ s = 5 + 4 + 3 / 2 = 12/2 = 6
⇒ s - a = 6 - 5 = 1
⇒ s - b = 6 - 4 = 2
⇒ s - c = 6 - 3 = 3
⇒ Area = √6 × 1 × 2 × 3
⇒ Area = √36 = <u>6 m²</u>
Finding the Surface Area :
⇒ 2 × 6 + 12 × 6
⇒ 12 + 72
⇒ <u>84 m²</u>
