The monthly cost of a wireless telephone plan is $29.99 for up to 450 min of calling time plus $0.45 per minute for each minute over 450 min. The equation that describes the cost of this plan is C = 0.45x + 29.99, where x is the number of minutes over 450. What is the cost of this plan if a person uses 387 min and 474 min of calling time? (a) 387 min %24 (b) 474 min 24 Need Help? Read It Watch It
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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