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General
One number is 13 less than another. Twice the larger is equal to 7 times the smaller increased by 1. find the numbers.
General
4 months ago
One minute after it is released, a hot-air balloon rises 120 feet. In each succeeding minute, the balloon rises only 60% as far as it rose in the previous minute. How far will the balloon rise in the fourth minute? Question 11 options: 25.92 ft 121.8 ft 15.552 ft 0.216 ft
General
4 months ago
3.61 In 2000 the population of California consisted of approximately 80% white, 8% black, and 12% Asian. Perform the following calculations. a. Find the probability that you met 3 white individuals, 1 black individual, and 1 Asian individual if you randomly met 5 Californians in 2000. b. Find the probability that you met more white people than black and Asian people combined if you randomly met 5 Californians in 2000.
General
4 months ago
Decide whether the exercise involves permutations or combinations, and then solve the problem. Marbles are being drawn without replacement from a bag containing 1414 marbles. (a) How many samples of 44 marbles can be drawn? (b) How many samples of 22 marbles can be drawn? (c) If the bag contains 44 yellow, 22 white, and 88 blue marbles, how many samples of 33 marbles can be drawn in which all marbles are blue? Does the problem involve permutations or combinations?
General
4 months ago
The weight of water is 62 1/2 per cubic feet. Water that weighs 325 lbs will fill how many cubic feet
General
4 months ago
A smoothie shop charges $4.80 for a small size 12-ounce smoothie and $6.40 for a large size 16-ounce smoothie. The manager has decided to begin selling a jumbo size 22-ounce smoothie. The manager needs to find a price for the new jumbo size smoothie. How can the manager use ratios to determine an appropriate price for the price of the jumbo size smoothie? Are the small and large smoothies priced in this way?
General
4 months ago
2z- 4 - 1z = 4 help solve!!
General
4 months ago
Heather, Deon, and Ali served a total of 106 orders. Deon served 4 times as many as Ali. Heather served 10 more orders then Ali. How many orders did they each serve.
General
4 months ago
Nicholas scoops a few gum balls into his bag when he weighs it he finds that he scooped 0.76 pounds how much will the gum balls cost show work gum balls $3.48 Nichols has decided to buy 1.5 pounds of sour patch kids how much will the sour patch kids cost sour patch kids $3.99 show work
General
4 months ago
Two methods are used to predict how many customers will call in for help in the next four days. The first method predicts the numbers of callers to be 23, 5, 14, and 20 for the four respective days. The second method predicts 20, 13, 14, and 20 for the four respective days. The actual numbers of callers turn out to be 23, 10, 15, and 19. Which method has the smaller mean absolute percentage error (MAPE)?
General
4 months ago
Nora and Lila are reading the same novel for book club. Nora is on page 128 and plans to read 8 pages per day until the next club meeting. Lilais on page 102 and plans to read 12 pages per day until the next club meeting.After how many days of reading will Nora and Lila be on the same page of the book? What page will they be on? NORA AND LIKA WILL BE ON THE SAME PAGE AFTER ____ DAYS OF READING . ON THAT DAY , THEY WILL BITH BE ON PAGE ___
General
4 months ago
Nigel has 3 rolls of ribbon. Each roll has 8 3/4 feet of ribbon. It takes 1 3/4 feet of ribbon to make one bow. What is the total number of bows that Nigel can make using these 3 rolls of ribbon
General
4 months ago
Neurons fire action potentials (spikes) at different frequencies under different circumstances. In one study, researchers position an awake-behaving monkey so that he or she is looking at a luminous dot 40 cm away, and they record the activity of a single neuron in the monkey's brain to determine the neuron's baseline. Over the course of 64 trials randomly interspaced with other conditions, that neuron is found to have an average baseline of x¯=26.8 spikes per second with a standard deviation of ????=33.2 spikes per second. What is the standard error of the sample mean, SE, in spikes per second? Give your answer to two decimal places.
General
4 months ago
Natalie sawed five boards of equal length to make a stool. Each was 9 tenths of a meter long. What is the total length of the boards she sawed? Express your answer as the sum of a whole number and the remaining fractional units.
General
4 months ago
A group of college DJs surveyed students to find out what music to plan for their upcoming parties. Thirty percent of the students preferred dubstep, 25% of the students liked trance music, and 20% wanted to hear only house music. Fifteen percent of the respondents selected both dubstep and trance.A - The proportion of students that like trance music but not dubstep is:a) 20% .b) 5% .c) 10% .d) 15%B - The proportion of students that like either dubstep or trance is:a) 40% .b) 100% .c) 55% .d) 70% .C - The proportion of students that like neither trance music nor dubstep is:a)60% .b) 20% .c) 0% .d) 40% .D - The proportion of students that didn’t select any of the music options available on the survey was:a) 0% .b) 40% .c) 20% .d) 60% .E - The proportion of students that preferred either dubstep or trance is calculated by:a) P(A)+P(B)+P(A and B) .b) None of the answer options are correct.c) P(A)+P(B) .d) P(A)+P(B)?P(A and B) .F - The conditional probability that a student likes dubstep, given that he or she likes trance music, is:a) 70% .b) 65% .c) 60% .d) 55% .
General
4 months ago
Dave the jogger runs the same route every day (about 2.2 miles). On 18 consecutive days, he recorded the number of steps on his Fitbit. The results were 3,450 3,363 3,228 3,360 3,304 3,407 3,324 3,365 3,290 3,289 3,346 3,252 3,237 3,210 3,140 3,220 3,103 3,129 Click here for the Excel Data File (a) Construct a 95% confidence interval for the true mean number of steps Dave takes on his run. (Round your answers to 2 decimal places.) The 95% confidence interval is from to . (b) What sample size would be needed to obtain an error of ± 20 steps with 95% confidence? (Enter your answer as a whole number (no decimals). Use a z-value taken to 3 decimal places in your calculations.) Sample size
General
4 months ago
Put the following in order for the most area in the tails of the distribution. (a) Standard Normal Distribution (b) Student's t-Distribution with 30 degrees of freedom. (c) Student's t-Distribution with 50 degrees of freedom. (This is a reading assessment question. Be certain of your answer because you only get one attempt on this question.
General
4 months ago
Use implicit differentiation to find an equation of the tangent line to the curve at the given point. x2/3 + y2/3 = 4 (−3 3 , 1) (astroid)
General
4 months ago
Find the area of the surface. The surface with parametric equations x = u2, y = uv, z = 1 2 v2, 0 ≤ u ≤ 2, 0 ≤ v ≤ 1.
General
4 months ago
Reserve Problems Chapter 4 Section 5 Problem 2 A laptop company claims up to 10.1 hours of wireless web usage for its newest laptop battery life. However, reviews on this laptop shows many complaints about low battery life. A survey on battery life reported by customers shows that it follows a normal distribution with mean 9.5 hours and standard deviation 30 minutes. (a) What is the probability that the battery life is at least 10.1 hours? Round your answer to four decimal places (e.g. 98.7654).
General
4 months ago
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