Find the average value of the elliptical paraboloid 7x^2 + 3y^2 = z over the region -1 lessthanorequalto x lessthanorequalto 1 and -1 lessthanorequalto y lessthanorequalto 1.

Sienna planned a trapezoid-shaped garden, as shown in the drawing below. she decides to change the length of the top of the trapezoid-shaped garden from 32 ft to 24 ft. which expression finds the change in the scale factor?

School has 204 sixth grade students. if the sixth grade is 30% of the total school, how many students are in the middle school?

Abicycle training wheel has a radius of 3 inches. the bicycle wheel has a radius of 10 inches.approximately how much smaller, in square inches and rounded to the nearest hundredth, is the area of the training wheel than the area of the regular wheel? *