4. A local club is arranging a charter flight to Hawaii. The cost of the trip is $558 each for 81 passengers, with a refund of $5 per passenger for each passenger in excess of 81. a. Find the number of passengers that will maximize the revenue received from the flight. b. Find the maximum revenue. a. The number of passengers that will maximize the revenue received from the flight is (Round to the nearest integer as needed.) b. The maximum revenue is $ A rectangular tank with a square base, an open top, and a volume of 108 ft° is to be constructed of sheet steel. Find the dimensions of the tank that has the minimum surface area. 5. The dimensions of the tank with minimum surface area are ft. (Simplify your answer. Use a comma to separate answers.) A closed box with a square base is to have a volume of 128,625 cm°. The material for the top and bottom of the box costs $7.50 per square centimeter, while the material for the sides costs $2.50 per square centimeter. Find the dimensions of the box that will lead to the minimum total cost. What is the minimum total cost? 6. Write an equation for C(x), the cost of the box as a function of x, the length of a side of the base. C(x) = The length and width are each (0) (1)- your choice The height is (2) The minimum total cost is $ For he (1) O cm. (2) cm2. For the cm cm?. cm O cm. Al the low At the upper dooint

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Unitary Method

The word “unitary” comes from the word “unit”, which means a single and complete entity. In this method, we find the value of a unit product from the given number of products, and then we solve for the other number of products. 

Speed, Time, and Distance

Imagine you and 3 of your friends are planning to go to the playground at 6 in the evening. Your house is one mile away from the playground and one of your friends named Jim must start at 5 pm to reach the playground by walk. The other two friends are 3 miles away.

Profit and Loss

The amount earned or lost on the sale of one or more items is referred to as the profit or loss on that item.

Units and Measurements

Measurements and comparisons are the foundation of science and engineering. We, therefore, need rules that tell us how things are measured and compared. For these measurements and comparisons, we perform certain experiments, and we will need the experiments to set up the devices.