Allen started to save money from his daily allowance. In the first week he saved $5.8 and every next week $3.6 more than the pre

Question

3 years ago

15

vious week. How much money did he save in 4 weeks?

2 answers:

Vikentia [17] · Answer 1 · 2022-01-12T05:10:21+03:00

6 0

Answer: $16.60

Step-by-step explanation:

5.80+ 3.60= 9.40+ 3.60= 13.00+ 3.60= 16.60

So after 4 weeks he earned $16.60

OverLord2011 [107] · Answer 2 · 2022-01-12T06:49:50+03:00

Answer:

$44.8.

Step-by-step explanation:

Let a = first term = $5.8

d = common difference = $3.6

n = number of terms = 4

Using the sum of terms

Sn = n/2((2a + (n - 1)d))

Sn = 4/2((2(5.8) + (4 - 1)3.6))

= 2(11.6 + 10.8)

= 2(22.4)

= 44.8

In 4 weeks, Allen would have saved $44.8.