Find the volume make it an improper fraction then a mixed number please do a step by step explanation and I will give you brainliest

What is the solution to the equation? k/6.4=8.7 2.3 5.568 15.1 55.68

I'm at a bookstore with $\$35$ in my pocket and a $20\%$-off coupon. what is the cost of the most expensive book i can buy with my money and the coupon? (assume that there are books of every possible price in the bookstore. it's a large bookstore! )

Will give brainliest b. describe the function over each part of its domain. state whether it is constant, increasing, or decreasing, and state the slope over each part.