Please show all work! Just answer part D!
Q: 4. Let R be a ring. (a) Let x, y, z € R. Prove that, if x | y and y | z, then x | z. (b) Prove that…
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Please show all work! Just answer part D!
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- The radius of a right circular cylinder is increasing at a rate of 7 inches per minute, and the height is decreasing at a rate of 4 inches per mince. What is the rate of change of the surface area when the radius is 14 inches and the height is 36 inches? S=21Rh+ 21² O 81277 in./min O 86877 in./min O 928 / in./min O 896 77 in./min O 784 77 in./minThe length / of a rectangle is increasing at a rate of 2 cm/s while the width w is decreasing at a rate of 2 cm/s. When /= 15 cm and w = 8 cm, find the rates of change of the area, the perimeter, and the lengths of the diagonals of the rectangle. Determine which of these quantities are increasing, decreasing, or constant.25 feet long ladder that was leaning against the wall as shown below. The top end of the ladder was sliding down at the rate of - 4 feet per second. How fast was the bottom end of the ladder skidding away when the top end of the ladder was 15 feet above the ground? At that moment, what was the rate of the angle of elevation formed by the bottom end of the ladder and the ground was decreasing? label all sides as A= the wall, B = the ground and C = the ladder) Ladder
- The reciprocal squared function f(x)=1/x^2 shifted to the right 2 units.4) A cat is running straight toward a 20 foot tall brick wall at a rate of 4 feet per second. Straight in front of him, on top of the wall sits a mouse. How quickly is the distance between the cat and the mouse changing when the cat is 25 feet away from the mouse?So, the distance between two charged particles is d and the electrostatic force is F, in newtons, the distance between the two particles is given by the formula F(d)= 2÷d^2. Find the average rate of change of force if the distance between the two particles is increased from 3 to 24 cm.
- A farmer wants to fence in 800 ?t2 of land in rectangular plot to be used for different types of shrubs. The plot is to be divided into four equal plots with three fences parallel to the same pair of sides. What is the least number of feet of fence needed? Use derivative and second derivative test method within your solution.The length { of a rectangle is decreasing at a rate of 2 cm / sec while the width w is increasing at a rate of 2 cm / sec. When { = 12 cm and w = 5 cm, find the rates of change of the area, the perimeter, and the lengths of the diagonals of the rectangle. Determine which of these quantities are increasing, decreasing, or The rate of change of the area of the rectangle is cm? / sec. 2 (Simplify your answer.) constant.The output of a widget factory is Q(L0=330L^1/2 widgets when L worker-hours of labor are employed. Find the average rate of change of output as the labor force increases from 100 to 144 worker-hours.
- Suppose an equilateral triangle has edges of lengths x. As the lengths of the edges increase, the area increases by V .square centimeters per minute. At what rate is = 5 , -- centimeters per minute. Write the length of the edge changing when each edge is 5 centimeters? At the length of each edge is increasing by the number below and round the solution to the nearest ten thousandths of a centimeter.Christine is 300 meters away from the launch pad of a hot air balloon. The hot air balloon rises from the launch pad at a speed of 30 meters per second. How fast is the angle of elevation* of her line of sight to the hot air ballon changing 20 seconds after launch?*The angle of elevation is defined to be the acute angle formed by the ground and the person's line of sight to the object.A car is driving away from a crosswalk. The formula d=t^2+3t expresses the car's distance from the crosswalk in feet, d, in terms of the number of seconds, t, since the car started moving. Suppose tt varies from t=1 to t=5. Does the car travel at a constant speed over this interval of time? Select an answer Yes No What is the car's average speed over this interval of time? feet per second in a mathematical expression Suppose t varies from t=1.3 to t=2.2 Does the car travel at a constant speed over this interval of time? Select an answer Yes No What is the car's average speed over this interval of time? feet per second in a mathematical expression