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a rocket is 1 mile above the earth in 30 seconds and 5 miles above the earth in 2.5 minutes. What is the rockets rate of change in miles per minute?
General
6 months ago
The length of a rectangle is 5 inches less than twice it’s width. If the rectangle has a perimeter of 80 inches, find the length and the width.
General
6 months ago
A TV screen is 41 cm long and 31 cm high. The length of the diagonal is closest to: A) 49 cm Eliminate B) 51 cm C) 54 cm D) 48 cm
General
6 months ago
Use the quadratic formula to si3x2 + 8x – 4= 0
General
6 months ago
A simple random sample with n = 58 provided a sample mean of 24.5 and a sample standard deviation of 4.4. (Round your answers to one decimal place.) (a) Develop a 90% confidence interval for the population mean. to
General
6 months ago
The National Assessment of Educational Progress administers standardized achievement tests to nationwide samples of 17-year-olds in school. One year, the tests covered history and literature. You may assume that a simple random sample of size 6,000 was taken. Only 36.1% of the students in the sample knew that Chaucer wrote The Canterbury Tales, but 95.2% knew that Edison invented the light bulb.11 (a) If possible, find a 95%-confidence interval for the percentage of all 17-year-olds in school who knew that Chaucer wrote The Canterbury Tales. If this is not possible, why not? (b) If possible, find a 95%-confidence interval for the percentage of all 17- year-olds in school who knew that Edison invented the light bulb. If this is not possible, why not?
General
6 months ago
Omar, Amare and jack paid a total of 68.25$ for dinner and a concert tickets cost $9.75 each. If the friends split the dinner bill equally , how much did each friend spend on dinner
General
6 months ago
Please help me with these 2 questions I will make brainliest ( in the pictures)
General
6 months ago
HELLPP PLS I WILL CROWN YOU
General
6 months ago
An international calling plan charges 45 cents per minute or fraction of a minute for each call. Which graph models the cost, y, incents of making x minutes of international calls?
General
6 months ago
Write the explicit formula for the nth term of the arithmetic sequence 14, 28, 42.56Then find a13
General
6 months ago
2x+4y+2z= -85y-2z= 04z= -20
General
6 months ago
How large a sample should be selected to provide a 95% confidence interval with a margin of error of 10? Assume that the population standard deviation is 40. (Round your answer up to the nearest whole number.)
General
6 months ago
Test the claim that the two samples described below come from populations with the same mean. Assume that the samples are independent simple random samples.Sample 1: n1=24, x?? 1=14, s1=4.Sample 2: n2=28, x?? 2=9, s2=4.(a) The test statistic is ___.(b) Find the t critical value for a significance level of 0.02 for an alternative hypothesis that the first population has a larger mean (one-sided test): t?= ___.(c) The conclusion is-There is not sufficient evidence to warrant rejection of the claim that the two populations have the same mean.-There is sufficient evidence to warrant rejection of the claim that the two populations have the same mean and accept that the first population has a larger mean.
General
6 months ago
find all the zeros of the function g(x)=x^3-4x^2-x+22
General
6 months ago
Ashley works as a salesperson at an electronics store and sells phones and phoneaccessories, and makes a fixed commission for each phone sale and a different fixedcommission for each accessory sale. Yesterday Ashley sold 10 phones and 26accessories and made a total commission of $215. Today she sold 5 phones and 21accessories and made a total commission of $127.50. Determine the price of eachphone and the price of each accessory.
General
6 months ago
A square has an area of 364.81m2.Work out the perimeter of the square.
General
6 months ago
A relation is plotted as a linear function on the coordinate plane starting at point A (0, 3) andending at point B (2,7)What is the rate of change for the linear function and what is its initial value?Select from the drop-down menus to correctly complete the statements.The rate of change is Choose..._____and the initial value is Choose_____
General
6 months ago
A machine manufactures parts whose diameters vary according to the Normal distribution with mean 40.150 mm and standard deviation 0.003mm. An inspector measures a random sample of 4 parts. The probability that the average (x-bar) diameter of these 4 parts is less than 40.148 mm is about
General
6 months ago
The average salary of all residents of a city is thought to be about $39,000. A research team surveys a random sample of 200 residents; it happens that the average salary of these 200 is about $40,000 with a SD of $12,000. Make a z -test of the null hypothesis that this difference was just chance (in the sampling).Round your values to three decimal places.The test statistic is ____ .The P -value is approximately _____
General
6 months ago
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