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MATH SOLVE
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1. A researcher is interested in knowing about the number of hours UCF students sleep per night. In a survey of 400 UCF students, the average number of hours slept per night was 6.5 with a population standard deviation of 2 hours. a. Create a 95% confidence interval for the true number of hours slept by UCF students?
General
4 months ago
Stainless steels are frequently used in chemical plants to handle corrosive fluids, however, these steels are especially susceptible to stress corrosion cracking in certain environments. In a sample of 295 steel alloy failures that occurred in oil refineries and petrochemical plants in Japan over the last 10 tears, 118 were caused by stress corrosion cracking and corrosion fatigue (Materials Performance, 1981). Construct a 95% confidence interval for the true proportion of alloy failures caused by stress corrosion cracking.
General
4 months ago
the graph of which of the following will be perpendicular to the graph of 4x- 3y= -12a. 4x+3y=12b. y=-3/4x-8c.y=3/4x+1d. 3x-4y=1
General
4 months ago
How does the graph of g(x) = (x − 1)3 + 5 compare to the parent function f(x) = x3? g(x) is shifted 1 unit to the right and 5 units up. g(x) is shifted 5 units to the right and 1 unit up. g(x) is shifted 1 unit to the left and 5 units up. g(x) is shifted 5 units to the right and 1 unit down.
General
4 months ago
99 POINTS BRAINLIEST!! No fake answersA standard six-sided dice is repeatedly rolled until it lands on a two. What is the probability that the first two is rolled after the first six rolls?A) 33%B) 41%C) 53%D) 67%Suppose you buy one ticket for $1 out of a lottery of 1,000 tickets where the for the one winning ticket is to be $500. What is your expected value?A) $0.00B) $-1.00C) $-0.40D) $-0.50
General
4 months ago
What set of integers fall in the solution set of the following inequality:1/3x<3x+8<-5x
General
4 months ago
Jake tosses a coin up in the air and lets it fall to the ground. The equation that models the height (in feet) and time (in seconds) of the parabola is h(t)= -16t^2+ 24t+6. What is the height of the coin when Jake tosses it?
General
4 months ago
Solve the system of linear equations. 2x + 5y = 12 4x − y = 2
General
4 months ago
A clock was showing the time accurately on Wednesday at 4pm. On the following Saturday, at 2pm, the clock was running late by 35 seconds. On average, how many seconds did the clock skip every 30 minutes?
General
4 months ago
A jar contains 8 red marbles and y white marbles. If Joan takes 2 random marbles from the jar, is it more likely that she will have 2 red marbles than that she will have one marble of each color?(1) y ≤ 8(2) y ≥ 4
General
4 months ago
An artist mixes paint to make new colors. She uses 1/3 cup of red paint and 1/3 cup of yellow paint to make a batch of orange paint. If the artist has 2 cups of red paint available and 3 cups of yellow paint available, how many batches of orange paint can she make?
General
4 months ago
Multiply.12x4(−56x3y2)
General
4 months ago
Sal wants to know if he has enough money to buy 4 gallons of gas. If he has $15, and each gallon of gas costs $3.29, which is a good estimate for whether Sal will be able to afford 4 gallons of gas?$3 + $3 + $3 + $3 = 12, so Sal can afford the gas. $4 + $4 + $4 + $4 = 16, so Sal can afford the gas. $3 + $3 + $3 + $3 = 12, so Sal cannot afford the gas.$4 + $4 + $4 + $4 = 16, so Sal cannot afford the gas.
General
4 months ago
Use the quadratic formula to solve the equation. If necessary, round to the nearest hundredth.a2 − 28a + 192 = 0
General
4 months ago
Graph the system of inequalities presented here on your own paper, then use your graph to answer the following questions:y > −2x + 3y is less than 1 over 2 times x minus 2Part A: Describe the graph of the system, including shading and the types of lines graphed. Provide a description of the solution area. (6 points)Part B: Is the point (−2, 3) included in the solution area for the system? Justify your answer mathematically. (4 points)
General
4 months ago
If you flip a coin 3 times, what is the probability of flipping heads 3 times?
General
4 months ago
HELLLLLLLLLLLLLLLLLLLPPPPPPPPPP 99PTSGraph the system of inequalities presented here on your own paper, then use your graph to answer the following questions:y > −2x + 3y is less than 1 over 2 times x minus 2Part A: Describe the graph of the system, including shading and the types of lines graphed. Provide a description of the solution area. (6 points)Part B: Is the point (−2, 3) included in the solution area for the system? Justify your answer mathematically. (4 points)
General
4 months ago
The table can be used to determine the solution to the system of equations, 2y − x = 8, and y − 2x = −5. Which solution can be used to fill in both blanks in the table? (1, 6) (6, 1) (7, 6) (6, 7)
General
4 months ago
Each set of (x, y) values represent a set of equivalent ratios. Find the ratio of x to y for each set to determine which set describes the proportional relationship: 40.5 ounces of nuts to 48.6 ounces of raisins. A) (5, 7)(60, 84)(47, 65.8) B) (36, 48.6)(2, 2.7)(12, 16.2) C) (3, 3.9)(65, 84.5)(24, 31.2) D) (11, 13.2)(99, 118.8)(20, 24)
General
4 months ago
Find the number of real number solutions for the equation. x2 – 10x + 25 = 021those are my f answqer chgoices
General
4 months ago
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