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The diagram shows a scale drawing of a playground. In the scale drawing the playground has a length of 16 cm and a width of 8 cm. The area of the actual playground is 72 square meters what is the scale of the drawing?
General
2 months ago
The attachment is the question with the given answer choices, it's just tricky for me..
General
2 months ago
A car-rental company is interested in the amount of time its vehicles are out of operation for repair work. State all assumptions and find a 90% confidence interval for the mean number of days in a year that all vehicles in the company's fleet are out of operation if a random sample of 10 cars showed the following number of days that each had been inoperative. 10 13 20 15 17 22 8 14 19 7 State all assumptions. Select all the assumptions below. A. The sample comes from a normal population B. The sample size is at least 30 C. It is a random sample D. The variance is less than the mean Find a 90% confidence interval for the population mean. The 90% confidence interval is from a lower limit of nothing to an upper limit of nothing. (Round to two decimal places as needed.)
General
2 months ago
Consider two medical tests, A and B for a virus. Test A is 90% effective at recognizing the virus when it is present, but has a 5% false positive rate. Test B is 80% effective at recognizing the virus when it is present, but only has a 1% false positive rate. The two tests are independent (i.e., they use different means for identifying the virus). The virus is carried by 2% of all people. If you could use only one of the two tests to identify the virus, which would you choose? Justify your answer mathematically. How much more certain can you be if you can use both tests?
General
2 months ago
what is the area of this circle ( express your answer by using pi)A. A=3 pi m²B. A=6 pi m²C. A=9 pi m²D. A=36 pi m²
General
2 months ago
What are the sine cosine and tangent of theta=7pi/4 radians
General
2 months ago
Find -4u + 2v??????????????
General
2 months ago
Please help need to pass
General
2 months ago
Rowan has 3 pieces of yarn as described below A red piece of yarn that is 3/4 foot longA yellow piece of yarn that is 6/8 foot longA blue piece of yarn that is 4/12 foot longWhich number sentence correctly compares the length of these pieces of yarn?
General
2 months ago
Cameron flips two coins and then spins the spinner below. What is the probability of having two different outcomes on the coins and spinning an odd number?A. 1/16B. 1/8C. 1/4D. 1/2the numbers on the spinner are 1, 2, 3, and 4.
General
2 months ago
At 9:00 on Saturday morning, two bicyclists heading in opposite directions pass each other on a bicycle path.The bicyclist heading north is riding 5 km/hour faster than the bicyclist heading south. At 10:45, they are 47.25 km apart. Find the two bicyclists’ rates.
General
2 months ago
Evaluate the summation of 20 times 0.5 to the n minus 1 power, from n equals 3 to 12..A.) 9.99B.) 19.95C.) 29.98D.) 39.96
General
2 months ago
A group of statistics students decided to conduct a survey at their university to find the average (mean) amount of time students spent studying per week. They sampled 240 students and found a mean of 22.3 hours per week. Assuming a population standard deviation of six hours, what is the confidence interval at the 95% level of confidence? (Please use Student's t distribution (Appendix B.5) at infinite degrees of freedom for three decimal accuracy of the required z value.)
General
2 months ago
According to USA Today, customers are not settling for automobiles straight off the production lines. As an example, those who purchase a $355,000 Rolls-Royce typically add $25,000 in accessories. One of the affordable automobiles to receive additions is BMW's Mini Cooper. A sample of 179 recent Mini purchasers yielded a sample mean of $5,000 above the $20,200 base sticker price. Suppose the cost of accessories purchased for all Mini Coopers has a standard deviation of $1,500. Calculate a 95% confidence interval for the average cost of accessories on Mini Coopers.
General
2 months ago
How many shoppers made a purchase at an online store, a locally-owned store, and a big-box store?
General
2 months ago
Simplify the expression.(8+20)÷4+3Enter your answers in the boxes. (8+20)÷4+3= ÷4+3= + 3=
General
2 months ago
The data given to the right includes data from 34 candies, and 10 of them are red. The company that makes the candy claims that 29% of its candies are red. Use the sample data to construct a 95% confidence interval estimate of the percentage of red candies. What do you conclude about the claim of 29%? Construct a 95 % confidence interval estimate of the population percentage of candies that are red.
General
2 months ago
megan cut 108 roses to make flower arrangements. she made 9 equal arrangements. how many roses were in each arrangement.
General
2 months ago
Roland’s Boat Tours sells deluxe and economy seats for each tour it conducts. In order to complete a tour, at least 1 economy seats must be sold and at least 6 deluxe seats must be sold. The maximum number of passengers allowed on each boat is 30 Roland’s Boat Tours makes $40 profit for each economy seat sold and $35 profit for each deluxe seat sold. What is the maximum profit from one tour?
General
2 months ago
Use a normal approximation to find the probability of the indicated number of voters. In this case, assume that 141 eligible voters aged 18-24 are randomly selected. Suppose a previous study showed that among eligible voters aged 18-24, 22% of them voted. Probability that fewer than 36 voted
General
2 months ago
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