One hundred fifty eight thousandths greater or less than 158,000

Ifurniture stores having a weekend sale and is offering 20% discount on patio chairs and table the sales tax on furniture is 6.25 using function composition how can you represent the total amount a that you would need to pay for this furniture that cost x dollars

What is the prime factorization of 23 ?me with this question

Could somebody me with this radical simplification?