Answer:
See Explanation
Step-by-step explanation:
The question is incomplete as the conversion rate for both banks is not given.
However, I'll make the following assumptions.
Bank A: $80 for 392 stellars
Bank B: $50 for 240 stellars
Solving (a) Bank with better conversion rate.
First, we need to calculate the unit rate.
Unit Rate = Dollar/Stellar
For Bank A:
Unit Rate = 392/80
Unit Rate = 4.9 Stellars to $1
For Bank B:
Unit Rate = 240/50
Unit Rate = 4.8 Stellars to $1
The bank with higher unit rate has a better exchange rate.
Hence, bank A has a better exchange rate.
Solving (b): How much more will he get if $1200 is exchanged
For Bank A:
$1 = 4.9 Stellars
Multiply both sides by 1200
$1 * 1200 = 4.9 * 1200 Stellars
$1200 = 5880 Stellars
For Bank B:
$1 = 4.8 Stellars
Multiply both sides by 1200
1200 * $1 = 4.8 * 1200 Stellars
$1200 = 5760 Stellars
Calculate their difference
Difference = 5880 - 5760
Difference = 120 Stellars
Hence, he'll get 120 more Stellars if he exchanged with bank A.
