3. A science experiment involves periodically measuring the number of mold cells present on a piece of bread. At the start of the experiment, there are 50 mold cells, Each time a periodic observation is made, the number of mold cells triples. TA: Write an exponential function where, x is an observation and, y is total number of mold cells present. Part B: How many mold cells will be present in the fourth observation? 4. You recently purchased a new car for $28,000. The car's value depreciates 7% each year. Part A: Write an exponential function where, x is an observation and, y is total number of mold cells present. Part B: What will be the value of the car 5 years after it was purchased? (round to the nearest dollar)

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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.