20) Madison worked m hours earning $10 per hour and n hours earning $12 per hour. The total amount she earned was at least $300. Which inequality models this situation?
A 12m + 10n <_300
12m + 10n >_300
C 10m + 12n < 300
D 10m + 12n 2 300
please help

(98 points) i need with 5 questions. answer definitions are welcomed, but not necessary.

1. what is the measure of ∠abc? what is the measure of ∠abd?

Assume that the weights of quarters are normally distributed with a mean of 5.67 g and a standard deviation 0.070 g. a vending machine will only accept coins weighing between 5.48 g and 5.82 g. what percentage of legal quarters will be rejected? round your answer to two decimal places.