Question

16 x 2n+1 - 4x21 16 x 2n+2 - 2x 2n+2​

Answer 1

Step-by-step explanation:

16×2

n+2

−2×2

n+2

16×2

n+1

−4×2

n

=

16×2

2

×2

n

−2×2

2

×2

n

16×2×2

n

−4×2

2n

(asa

m+n

=a

m

−a

n

)

=

2

n

(16×2

2

−2×2

2

)

2

n

(16×2−4)

=

16×4−2×4

32−4

=

56

28

=

Answer 2

Answer:

Answer: 56.44 km/h

Step-by-step explanation:

Speed = Distance / Time

Time = 1950 - 1520 = 4 hours 30 minutes = 4.5 hours

Speed = 254/4.5

= 56.44 km/h