The function r(t) is the rate of change of the quantity of water in a county reservoir, in acre-feet per day. an acre-foot is a volume of water that would cover one acre of land to a depth of 1 foot, and t is the number of days since the beginning of the year. interpret the definite integral r(t)dt what are the correct units of the definite integral? o the definite integral represents the average rate of change in the volume of water in the reservoir between t 30 and t60. the units of the given definite integral are acre-feet per day. the definite integral represents the total change in the volume of water in the reservoir between t 30 and t 60 the units of the given definite integral are acre-feet. andt 60. the units of the given definite integral are acre-feet per day. t 30 and t 60. the units of the given definite integral are acre-feet per day. o the definite integral represents the total change in the volume of water in the reservoir between t 30 o the definite integral represents the rate of change in the volume of water in the reservoir between the definite integral represents the total volume of water in the reservoir when t-60. the units of the given definite integral are acre-feet.

Find a number such that if you add 8 and divide the result by 4 you will get the same answer as if you subtracted 3 from the original number and divided by 2

Geometry in the diagram, ∠abc is a right angle. ∠dbc = 30°27'40". find the measure of ∠abd.

Complete the worksheet. use 3.14 for π and round all decimals to the nearest hundredth. find the volume of the composite three-dimensional figure above. important terms are written in bold.1. the pyramid has a square base that is inscribed in the circular base of the cone. draw an image of the composite shape of the base. 2. if the side length of the square base is 8 units long, what is the diameter of the circular base of the cone from the picture in number 1? 3. now that the diameter has been calculated, what is the circular area of the cone? ignore the square base of the pyramid.? 4. what is the formula for volume of a cone? 5.to calculate the volume of the cone, the height is still needed. if the cone has a lateral surface with a length of 13 units, what is the height of the cone? 6.now find the volume of the cone. do not include the empty space for the pyramid. 7.. the side length of the square base of the pyramid is 8 units long. what is the base area of the pyramid? 8.what is the formula for the volume of a pyramid9. since the cone and the pyramid share the same vertex, what is the volume of the pyramid10.using the volume of the cone and the pyramid, find the volume of the composite shape. remember, the pyramid is empty. 11,. referring to the picture in number 1, what is the area of the composite base knowing that the square is empty? 12what is the formula to find the lateral surface area of a cone? (13find the lateral surface area of the cone14what is the lateral surface area shape of the pyramid? what is the formula for its area? 15to find the lateral surface area of the pyramid the length is still needed. calculate the lateral surface length of the pyramid. 16 now that the lateral surface length is known, what is the lateral surface area of the pyramid17. using the lateral surface areas of the cone and pyramid, along with the area of the composite base, what is the total surface area?