Risa saved $10 in Week 1. She saved $20 in Week 2 and $30 in Week 3. She continued saving in this pattern.
- In which week did she save $80?
- How much would she save in Week 18?
(a)
The week that Risa saved $80
= 80 ÷ 10
= 8
(b)
Amount that Risa saved in Week 18
= 18 x 10
= $180
Answer(s): (a) 8; (b) $180