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The resting heart rates for 80 women aged 46–55 in a simple random sample are normally distributed, with a mean of 71 beats per minute and a standard deviation of 6 beats per minute. Assuming a 90% confidence level (90% confidence level = z-score of 1.645), what is the margin of error for the population mean? Remember, the margin of error, ME, can be determined using the formula mc014-1.jpg.
General
3 months ago
Jorge wants to divide 3x2 – x – 2 by x + 4 using synthetic division. which shows the correct process?
General
3 months ago
A chemical company makes two brands of antifreeze. The first brand is 65% pure antifreeze, and the second brand is 90% pure antifreeze. In order to obtain 50gallons of a mixture that contains 70% pure antifreeze, how many gallons of each brand of antifreeze must be used?
General
3 months ago
There are 49 dogs in the dog show. There are 36 more small dogs than large dogs. How many small dogs are there?
General
3 months ago
The concentration, in parts per million, of a type of antibiotic in a human's bloodstream after h hours can be modeled by the polynomial function C(h) = −0.09h2 + 3.5h + 8. What is the concentration of the antibiotic after 3 hours in parts per million to the nearest hundredths?
General
3 months ago
Amir, Bobby, Cario, and Dante are on a baseball team. Their coach is going to select two of them randomly to be home plate umpire and field umpire at an upcoming little league game.What is the probability that Cario will be selected as home plate umpire and Amir will be selected as field umpire?
General
3 months ago
John and Hank work as gift wrappers at a toy store. In 4 minutes, John can wrap 2 small boxes. In 5 minutes, Hank can wrap 3 small boxes.In 20 minutes, John can wrap small boxes and Hank can wrap small boxes. So, Hank can wrap more small boxes in 20 minutes than John can.
General
3 months ago
What is the square root of 120x
General
3 months ago
the height h of a falling object t seconds after it is dropped from a platform 300 feet above the ground is modeled by the function h(t) =300-16t^2. Which expression could be used to determine the average rate at which the object falls during the first 3 second of its fall? A)h(3)-h(0)B)h(3/3)-h(0/3)C)h(3)/3D)h(3)-h(0)/3
General
3 months ago
In order to solve the system of equations (x-3y=2, 2x+y=11 using the elimination method, which of the following steps could be used? A. Multiply the first equation by 2 and then add that result to the second equationB. Multiply the first equation by 3 and then add that result to the second equationC. Multiply the second equation by 2 and then add that result to the first equationD. Multiply the second equation by 3 and then add that result to the first equation
General
3 months ago
The amount W of water used varies directly with the population 'N' of people. City 'A' has a population of 483,000 people and used 37.6 billion gallons of water in a fiscal year. Find out how many billion gallons of water we would expect City 'B' to use if we know that its population is 150,000W= (?) Billion of gallons of waterType an integer or decimal rounded to the nearest tenth as needed.
General
4 months ago
Plot (3 1/4,−3 1/2) on the coordinate plane.
General
4 months ago
Farmer Bill sold potatoes at the farm market. He sold a quarter to the first person, 4/9 of what was left to the second person, and the third buyer bought 4/5 of what was left and the last 10 lb. How many pounds of potatoes farmer Bill sold?
General
4 months ago
What is another name for plane P
General
4 months ago
A container is shaped like a cylinder with half spheres on each end the cylinder has a length of 30 centimeters and a radius of 5 cm to the nearest cubic centimeter how many cubic centimeters can one container hold do not round calculations until the final answer
General
4 months ago
The proportion between the hypotenuse of a right triangle and one of its legs is 13/12 , and the other leg is 15 cm long. Find the perimeter of the triangle.
General
4 months ago
In the human body, all body systems work to maintain homeostasis. One system stands out as a leader, as it works with all other body systems. That is the ___________ system. A) circulatory B) endocrine C) integumentary D) nervous
General
4 months ago
Kong took 15% percent fewer seconds than Nolan took to complete his multiplication timed test. Kong took 85 seconds. How many seconds did Nolan take?
General
4 months ago
A solid is formed by adjoining two hemispheres to the ends of a circular cylinder. the radius of the hemispheres is the same as the radius of the cylinder. the total volume of the solid is 16 cubic inches. what radius should the cylinder be to produce the minimum surface area?
General
4 months ago
The lengths of the legs of a right triangle are 12 cm and 16 cm. What is the length of the hypotenuse?A.56cmB.14cmC.28cmD.20cm
General
4 months ago
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