Question

PLEASE HELP!!!!! how do you write...

Day 1: 45min
Day 2: 45 x 2= 90 min
Day 3: 90 x 2= 180 min
Day 4: 180 x 2 = 360 min
Day 5: 360 x 2 = 720 min
Day 6: 720 x 2 = 1440 min
Day 7: 1440 x 2 = 2880 min
in sequence notation

Answer 1

7

∑ 45 2^(k-1)

k=1

Explanation:

We are multiplying by 2 each time

The 1st term of the sequence is 45

45 *2 ^(k-1)

a1 =45

a2 = 45* 2^(1) = 45*2 = 90

a3 = 45* 2^2 = 45*4 =180

a4 = 45* 2^3 = 45*8 =360

7

∑ 45 2^(k-1)

k=1