Olivia is single, 66 years old, and not blind. She paid all the cost of keeping up her home. She earned $55,000 in wages for 2019. Olivia provided all the support for her two grandchildren who lived with her all year. Cora is 11 years old and Jack is 15 years old. She does not have enough deductions to itemize. Olivia, Cora, and Jack are all U. S. citizens with valid Social Security numbers. 1. What is the amount of Olivia's standard deduction? A. $18,350 B. $20,000 C. $24,400 D. $25,700

Wo firms, a and b, each currently dump 50 tons of chemicals into the local river. the government has decided to reduce the pollution and from now on will require a pollution permit for each ton of pollution dumped into the river. it costs firm a $100 for each ton of pollution that it eliminates before it reaches the river, and it costs firm b $50 for each ton of pollution that it eliminates before it reaches the river. the government gives each firm 20 pollution permits. government officials are not sure whether to allow the firms to buy or sell the pollution permits to each other. what is the total cost of reducing pollution if firms are not allowed to buy and sell pollution permits from each other? what is the total cost of reducing pollution if the firms are allowed to buy and sell permits from each other? a. $3,000; $1,500 b. $4,500; $3,500 c. $4,500; $4,000 d. $4,500; $2,500