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Calculator . By the end of January a web site received 125 hits. By the end of A

ID: 2987022 • Letter: C

Question

Calculator. By the end of January a web site received 125 hits. By the end of April the same year the number web site hits was 2000. If the number of hits is increasing at an exponential rate, identify the continuous rate of growth. Then write an exponential equation to model this situation. Use your model to predict the number of months it will take for the web site to receive 2 million hits

B. Calculator. Thanks to the chicken pox vaccine the number of reported cases of chicken pox is decreasing at an exponential rate. In 1980, 190.9 thousand cases were reported and in 2010 only 32.2 thousand cases were reported. Identify the rate of decline and write an exponential equation to model this situation. Use your model to predict when the number of cases will drop below 20,000

C. Calculator. A wire bracing a transmission tower is 30 meters long and makes a 40 degree angle with the ground. It is to be replaced by a 40 meter wire starting from the same point on the ground. How much further up the tower will the new wire reach?



Explanation / Answer

C. ans:6.42m { 10sin40}

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