Answer:
2 to 1; 2:1
Step-by-step explanation:
There are two cups of water and one cup of rice. It's a two to one ratio.
2:1
here ( + ) × ( - ) = ( - )
1. 1458
2. 500 or -500
1. a4=54, a5=162
r = 162/54 = 3
a7 = a5 × r²
= 162 × 3² = 1458
2.a4=-4, a6=-100
r² = -100/-4 = 25
r = +/- 5
a7 = a6 × r
= -100 × +/- 5
= +/- 500
