The graph of f’’(x) is continuous and decreasing with an x-intercept at x=-3. which of the following statements must be true? a. the graph of f is always concave down b. the graph of f has an inflection point at x=-3 c. the graph of f has a relative minimum at x=-3 d. none of these are true

() at a farm, animals are fed bales of hay and buckets of gain. each bale of hay is in the shape of a rectangular prism. the base side lengths 2 feet and 3 feet, and the height is 5 feet. each bucket of grain is a cylinder with diameter of 3 feet. the height of the bucket is 5 feet as the height of bale. a. which is larger in area, the rectangular base of the bale or the circular base of the bucket? explain how you know b. which is larger in volume, the bale or the bucket? explain how you know

Jada has a meal in a restaurant she adds up the prices listed on the menu for everything they ordered and gets a subtotal of $42.00. when the check comes, it says they also need to pay $3.99 in sales tax. what percentage of the subtotal is the sales tax

Can someone me with #s 8, 9, and 11. with just one of the three also works. prove using only trig identities.