Please help ! and it’s also 20 points

You eat $0.85 for every cup of hot chocolate you sell. how many cups do you need to sell to earn $55.25

Renee hiked for 6 3 /4 miles. after resting, renee hiked back along the same route for 5 1 /4 miles. how many more miles does renee need to hike to return to the place where she started? represent your answer as a simplified mixed number, if necessary.

Determine where the function h(z)=6+40z^3−5z^4−4z^5 is increasing and decreasing.