Eliza's mother gave her $200 to buy textbooks for her first semester in college. When she got to the store, she decided to go straight past the used textbook section with offers up to 75% off the normal price to find the new textbooks she needed. When she got to the register the total came to $500, so she put the remainder on her credit card. Which of the following sentences best describes Eliza's financial decision?

In all honesty, there really is no “work” per say to show. mainly it’s just using the process of elimination. the question is asking which domain(s) would be the most appropriate for the function c(n). n is the number of observed vehicles so right away, 1, 2, and 3 can be eliminated.why? 1, 2 start in the negatives and therefore it is impossible to observe negative cars. so, #4 would be the best answer to the given problem.

First step is to get rid of the square root. remember that a square root is the same as raising to the (1/2) power. see below: multiply exponents per exponent rules to get: remember you subtract exponents from the denominator and add exponents in the numerator so: simplify further: so a is the correct choice. if you don't understand this google exponent rules and it will you understand. look at the image results.