The answer would be 93.8667 feet per second.
64 miles to feet is 337,920
1 hour = 3600 seconds.
337,920 ÷ 3600 = 93.8667
        
             
        
        
        
Answer:
Perimeter = 18 units
Step-by-step explanation:
one side = 4
other side²  = 3² + 4² + 25
other side = √25 = 5
Perimeter = (2 x 4) + (2 x 5) = 18 units
 
        
             
        
        
        
Answer:
Step-by-step explanation:
for nr. 1
sum of angles in  a triangle=180
x=180-(81+84)=15
acute triangle
for nr.2
x=180-(24+36)=120
obtuse triangle 
 
        
             
        
        
        
The surface area of the right triangular prism is 270 sq ft
<h3>Total surface ara of the prism</h3>
The total surface area of the prism is the  sum of all the area of its faces
For the two triangles
A = 2(0.5bh)
A = bh
A = 7 * 12 = 84 sq.ft
For the two rectangles
A = 2lw
A = 2(6*12)
A = 2 * 72 = 144 sq.ft
For the third triangle;
Area  6ft * 7ft
Area = 42 sq.feet
Taking the sum of the areas
TSA = 84 + 144 + 42
TSA  = 270 sq ft
Hence the surface area of the right triangular prism is 270 sq ft
Learn more on surface area of prism here; brainly.com/question/1297098