4. Jack is sitting at the top of a lighthouse that is 25m above sea level. From his point of view, the angle of depression to a boat on the water is 11°. Determine how far the boat is from the lighthouse, to the nearest metre. 5. During an adventure race, John's team started hiking along a short path that goes directly north at a pace of 5km/h. At the same time, Mike's team decided to go directly east on a longer and less steep path at a pace of 6km/h. After 3hours, how far apart are the two teams, to the nearest tenth of a kilometer?
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.
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