Your company has 50 employees and you are ordering custom printed t-shirts and travel mugs for everyone. The printing company offers you two packages. You can purchase 40 t-shirts and 10 travel mugs for $340 or 20 t-shirts and 30 travel mugs for $470. Write a system of
equations that could be used to determine the cost of each t-shirt and each travel mug. (Don't solve, just write the system of equations.)

45% of the trees in a park are apple trees. there are 27 apple trees in the park. how many trees are in the park in all?

3.17 scores on stats final. below are final exam scores of 20 introductory statistics students. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 57, 66, 69, 71, 72, 73, 74, 77, 78, 78, 79, 79, 81, 81, 82, 83, 83, 88, 89, 94 (a) the mean score is 77.7 points. with a standard deviation of 8.44 points. use this information to determine if the scores approximately follow the 68-95-99.7% rule. (b) do these data appear to follow a normal distribution? explain your reasoning using the graphs provided below.

The length of an intercepted arc of a central angle of a circle is 4 cm. if the radius of the circle is 5 cm what is the measurement of the central angle to the nearest whole degree