7. Measles is still a leading cause of vaccine-preventable death among children, but because of improvements in immunizations, measles deaths have dropped globally. The function N(t) =-2.42t³ + 24.5t² – 123.3t + 506 (0st<6) gives the number of measles deaths (in thousands) in sub-Saharan Africa in year t, with t = 0 corresponding to the beginning of 1999. a) How many measles deaths were there in 1999? In 2005? b) Show that N'(t) <0 on (0, 6). What does this say about the number of measles deaths from 1999 through 2005? c) When was the number of measles deaths decreasing most rapidly? What was the rate of
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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