a. Calculate the least squares (best-fit) line. Put the equation in the form of: ŷ=a+ bx. ý = 35.582+-.192x For each age group, pick the midpoint of the interval for the x value. (For the 80+ group, use 85. Enter exact numbers as integers, fractions, or decimals.) i. Age Group Midpoint 15-24 25-39 40-69 70-79 80+ ii. Predict the number of deaths for age 26. (Use your equation from part (a). Round your answer to one decimal place.) deaths per 100,000 Predict the number of deaths for age 60. (Use your equation from part (a). Round your answer to one decimal place.) iii. deaths per 100,000

A 8 P 10 Find the value of x.

Farmer Ed has 750 meters of fencing, and wants to enclose a rectangular plot that borders on a river. If Farmer Ed does not fence the side along the river, find the length and width of the plot that will maximize the area. What is the largest area that can be enclosed? 750 -2x The width, labeled x in the figure, is meters. (Type an integer or decimal.) The length, labeled 750 – 2x in the figure, is meters. (Type an integer or decimal.) The largest area that can be enclosed is square meters (Type an integer or decimal.)

Find the dimensions of the rectangular dog park producing the greatest enclosed area given 260 feet of fencing. The dimensions of each pen will be feet by feet Enter an integer or decimal number [more..]