A private space company is launching a network of about 11,000 satellites to provide internet connectivity globally. Each satellite has fuel to last about seven years, upon which it will steer itself into the atmosphere in order to burn up. On average about four satellites per day are expected to do this. Some satellites may not burn up completely and fragments large enough to cause injury may reach the surface of the Earth. The company estimates that about 10 such fragments per satellite on average will reach the surface of the Earth. The probability that the company's satellite constellation will cause an injury is 0.39 every seven years. Assume a Poisson distribution for fragments of satellites causing injury. Complete parts (a) through (d). a) What is the expected number of injuries every seven years? The expected number is (Round to three decimal places as needed.) b) What is the expected number of injuries per year? The expected number is (Round to three decimal places as needed.) c) What is the probability of injury in one year? The probability is (Round to three decimal places as needed.)
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.
A private space company is launching a network of about
satellites to provide internet connectivity globally. Each satellite has fuel to last about
years, upon which it will steer itself into the atmosphere in order to burn up. On average about
satellites per day are expected to do this. Some satellites may not burn up completely and fragments large enough to cause injury may reach the surface of the Earth. The company estimates that about 10 such fragments per satellite on average will reach the surface of the Earth. The
every
years. Assume a Poisson distribution for fragments of satellites causing injury. Complete parts (a) through (d).
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