76. sin 0.7 77. tan"'(-2) 78. cos(-0.2) 79. sec- 3 80. cot(-4)

In the previous activity, you drew quadrilaterals using a pair of concentric circles. Now let's draw quadrilaterals using only one circle. Circle Pwith diameter QR is shown. Use a new piece of patty paper for each quadrilateral. For precision, it is important to use a straightedge when tracing or R drawing line segments. 1. Draw quadrilateral QSRT by following these steps. Construct the perpendicular bisector to QR through point P. • Use patty paper to trace QR. * Without moving the patty paper, draw diameter ST of circle P in such a way that it is not perpendicular or coincident to OR Connect the eridpoints of the diameters to draw quadrilateral QSRT. a. What do you know about QR and ST? b. Use a ruler to measure the lengths of each side of the quadrilateral. What do you notice? c. Use a protractor to determine the measure of each interior angle of the quadrilateral. Which conjecture that you made in the previous lesson does this measurement support? d. What names can be used to…

Problem 3: Sam is interested in buying a TV but knows they will have to sell it in 5 years. If Sam buys an LG TV, they know it will decrease in price by $15 per year on average. If Sam buys a Samsung TV, they know it will decrease in price by 10% per year on average, Both TV's cost $899.99 to buy now. Which TV will be worth more after 5 years, and by how much? 5

In October 2005, a company employs 11000 people and its total monthly wage bill is 11 million dollars. What is the average monthly wage of the company's employees?   Average monthly wage :  ___dollars. The company is growing at a rate of 10 employees per month. The total monthly wage bill is increasing at a rate of 260 thousand dollars per month. At what rate is the average monthly wage changing at this time? Give your answer correct to the nearest cent per month.   Rate of change: ___ dollars per month. You should be careful over the units in this question. Hint: write the total monthly wage bill as the function f (t) and the number of employees as the function g (t). What is the average monthly wage in terms of the functions f and g?