Hi! So basically what you'll be doing is multiplying the exponents together :))
So It'd be 3x5 which is 15 so it'd be 10 to the power of 15.
Hope I helped :)) and ask more if you need help
-Kaylie
        
             
        
        
        
plz write your proper question
 
        
             
        
        
        
d = distance between the two cities
v₁ = average speed while going from chicago to kansas city = 440 knots
t₁ = time taken to travel distance going from chicago to kansas city 
time taken to travel distance going from chicago to kansas city is given as 
t₁ = d/v₁ 
t₁ = d/440                                        eq-1
v₂ = average speed while going from kansas city to chicago = 110 knots
t₂ = time taken to travel distance going from kansas city to chicago
time taken to travel distance going from kansas city to chicago is given as 
t₂ = d/v₂ 
t₂ = d/110                                                     eq-2
Given that :
t₂ = t₁ + 3
using eq-1  and eq-2
(d/110) = (d/440) + 3
d = 440
 
        
             
        
        
        
20: 1,2,4,5,10,20
28: 1,2,4,7,14,28
        
                    
             
        
        
        
Answer:
25/64
Step-by-step explanation:
ratio of perimeters = 15/24 = 5/8
ratio of areas = square of ratio of perimeters
ratio of areas = (5/8)^2 = 25/64