Answer:
147.7 m²
Step-by-step explanation:
Area of the triangular faces = 1/2 × base × height
A triangular pyramid has lateral faces with bases of 8 meters and heights of 10 meters.
Hence: 1/2 × 8 × 10 = 40 m²
A triangle has 3 faces, hence, area of the 3 faces = 3 × 40 m²
= 120m²
The area of the base of the pyramid is 27.7 square meters.
Hence, the surface area of the pyramid is calculated as:
Area of the 3 lateral faces of the pyramid + Base area
= 120m² + 27.7 m²
= 147.7 m²
The surface area of the pyramid is 147.7 square meters.
Answer:
D: 81
Step-by-step explanation:
3*3=9
9*3=27
27*3=81
Answer:
42 ft/s
Step-by-step explanation:
if superman travels 210 feet in 5 seconds, he will travel a fifth of 210 ft in 1 second
a fifth of 210ft is 210/5=42
hence 42ft/s is his rate.
Answer:
Part a) Each friend will receive 
Part b) 
or 
Step-by-step explanation:
Part a)
we know that
To calculate the weight of peanuts in pounds that each friend will
receive, divide the total pounds of peanuts by two
so
Part b)
Let
x-----> pounds of extra peanuts the friend needs to end up with 2 pounds of peanuts
we know that
Solve for x
Multiply by 40 both sides
Simplify
or 
