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MATH SOLVE
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Usually, Dolores has to stock the shelves by herself and it takes her 7.2 hours. Today Camille helped Dolores and they were able to finish the task in 2.8 hours. How long would it have taken Camille if she were working alone?
General
4 months ago
consider the parabola with a focus at the point (0,-3) and directrix y=2 . which two equations can be used to correctly relate the distance from the focus and the directrix to any point (x,y) on the parabola ?
General
4 months ago
Suppose a basketball player is practicing shooting, and has a prob-ability .95 of making each of his shots. Also assume that his shots are in-dependent of one another. Using the Poisson distribution, approximate theprobability that there are at most 2 misses in the first 100 attempts
General
4 months ago
Discrete MathA coin is flipped four times. For each of the events described below, express the event as a set in roster notation. Each outcome is written as a string of length 4 from {H, T}, such as HHTH. Assuming the coin is a fair coin, give the probability of each event.( a ) The first and last flips come up heads.( b ) There are at least two consecutive flips that come up heads.( c) There are at least two consecutive flips that are the same
General
4 months ago
Determine whether or not the random variable X is a binomial random variable. If so, give the values of n and p. If not, explain why not. a. X is the number of dots on the top face of fair die that is rolled. b. X is the number of defective parts in a sample of ten randomly selected parts coming from a manufacturing process in which 0.02% of all parts are defective.
General
4 months ago
Determine whether the lines L1:x=18+6t,y=7+3t,z=13+3t and L2:x=−14+7ty=−12+5tz=−8+6t intersect, are skew, or are parallel. If they intersect, determine the point of intersection; if not leave the remaining answer blanks empty.
General
4 months ago
During a recent drought, a water utility in a certain town sampled 100 residential water bills and found out that 73 of the residences had reduced their water consumption over that of the previous year. Find a 95% confidence interval for the proportion of residences that reduced their water
General
4 months ago
A country has two political parties, the Demonstrators and the Repudiators. Suppose that the national senate consists of 100 members, 44 of which are Demonstrators and 56 of which are Repudiators. (a) How many ways are there to select a committee of 10 senate members with the same number of Demonstrators and Repudiators? (b)Suppose that each party must select a speaker and a vice speaker. How many ways are there for the two speakers and two vice speakers to be selected?
General
4 months ago
Based on meteorological data for the past century, a local TV weather forecaster estimates that the region’s average winter snowfall is 23'', with a margin of error of {2 inches. Assuming he used a 95% confidence interval, how should view-ers interpret this news? Comment on each of these statements.a. During 95 of the past 100 winters, the region got between 21" and 25" of snow. b. There 's a 95% chance the region will get between 21" and 25" of snow this winter. c. There will be between 21" and 25" of snow on the ground for 95% of the winter days. d. Residents can be 95% sure that the area's average snowfall is between 21" and 25". e. Residents can be 95% confident that the average snowfall during the past century was between 21" and 25" per winter.
General
4 months ago
American General offers a 7-year ordinary annuity with a guaranteed rate of 6.35% compounded annually. How much should you pay for one of these annuities if you want to receive payments of $10,000 annually over the 7-year period?
General
4 months ago
Consider the half reactions below for a chemical reaction.(pictured below)What is the overall equation for this chemical reaction?choices below
General
4 months ago
Melissa and Joey enjoyed dinner at a restaurant. They paid the waiter $100.50 plus a 20% tip. How much did each person pay if they split the total bill in half? $60.30 $70.00 $75.10 $100.10
General
4 months ago
What is the perimeter of AEB
General
4 months ago
Honi is looking at a map with a scale of 1 4 in. = 20 miles. She measured the distance from Niceville to Live Oak as 2.5 in. She found the actual distance between Niceville and Live Oak by following these steps: Step 1: Set up a proportion 1 4 20 = 2.5 x Step 2: Cross multiply (20)(2.5) = ( 1 4 )(x) Step 3: Simplify 50 = 1 4 x Step 4: Solve for x, x = 250 miles Which step, if any, contains a mistake? A) Step 1 B) Step 2C) Step 3 D) Step 4
General
4 months ago
The center of a circle is at (−2, −7) and its radius is 6.What is the equation of the circle?(x−2)2+(y−7)2=36(x−2)2+(y−7)2=3(x+2)2+(y+7)2=3(x+2)2+(y+7)2=36The equation of a circle is (x+4)2+(y−5)2=121.What is the center and radius of the circle?center: (4, −5); radius: 11center: (−4, 5); radius: 121center: (−4, 5); radius: 11center: (−4, −5); radius: 121
General
4 months ago
The value of the investment is expected to grow by 3% per year. How long will it take to double?A. About 4 yearsB. About 6 yearsC. About 12 yearsD. About 24 years
General
4 months ago
Find the domain and range of the relation and determine whether it is a function.a. domain: all real numbers; range: all real numbers; Yes, it is a function.b. domain: positive integers; range: positive integers; No, it is not a function.c. domain: x ≥ 0; range: y > 3; No, it is not a function.d. domain: x > 3; range: y > 0; Yes, it is a function.
General
4 months ago
Francis teaches the piano. He charges each student an enrollment fee of $100 plus $15 per hour of piano lessons. The average cost of lessons for a student per hour is $25.
General
4 months ago
In 1987 the average price of gasoline was $0.94. Today the price of gas is about $3.00. What is the percent increase from 1987 to today? (explain the problem please)
General
4 months ago
The data set below represents the total number of touchdowns a quarterback threw each season for 10 seasons of play. 29, 5, 26, 20, 23, 18, 17, 21, 28, 20 1. Order the values: 5, 17, 18, 20, 20, 21, 23, 26, 28, 29 2. Determine the median: = = 20.5 Calculate the measures of variability for the data set. The range is ___ touchdowns. The interquartile range is ____ touchdowns.
General
4 months ago
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