1. 7 hours and 40 min
2. 1 hour and 24 min
3. 4 hours and 45 min
4. 8 hours and 48 min
Hi there!
Amit's reasoning is incorrect because multiplying a positive number by a negative number results in a negative result. The question also says that it is a charge to his account, which means that money is being taken away. Therefore, Amit's reasoning is incorrect because the bank is taking away money from him and his equation results in a positive value, instead of negative.
Hope this helps!! :)
If there's anything else that I can help you with, please let me know!
Answer:

Step-by-step explanation:
In every rhombus, when you have two diagonal segment bisectors, you will always have a circumcentre showing all midpoints of both segment bisectors, plus, it measures 90° all around, so with that being said, you have your answer.
I am joyous to assist you anytime.
Answer:
$210
Step-by-step explanation:
if she is selling each bar for 175% then she is also selling the pack for 175%.
Three packs is $120
Do 120* (1 + 0.75) = 210