Read these sentences from a concluding paragraph. By around 1700 BCE, most of the cities along the Indus River had been abandoned.
The Indian monsoon rains had weakened, causing less extensive floods, and as a result, less food was grown.
The reduced water supply caused the Indus River valley’s population to move eastward toward the Ganges River valley.
Which statement best describes the purpose of sentence 1?

It develops the topic.
It restates the essay’s thesis statement.
It reviews evidence presented to readers.
It summarizes the main ideas of the essay

If 10 men take 18 days to mow 60 acres of grass, how long will 15 men take to mow 80 acres?

The rate of decay of a radioactive substance depends upon the amount present initially. the mass y (mg) of the radioactive substance cobalt-60 present in a sample at time t (years) is represented by the exponential equation y=50e −0.1315 t . answer the following questions in complete sentences. 1. how does the exponential equation above compare to the equation for simple interest that is compounded continuously? explain the similarities. 2. what is the initial amount of cobalt-60 in the sample? 2. how much cobalt-60 is left after 8.4 years? show your work. 3. what would be the y-intercept of the graph? what does it represent? 4. after how many years will the amount of cobalt-60 left be 6.25 mg? explain what happens to the cobalt-60 after 50 years? 5. discuss some “real-world” examples and uses of cobalt-60

The sides of a parallelogram are 24cm and 16cm. the distance between the 24cm sides is 8 cm. find the distance between the 16cm sides