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Phoebe has a theory that older students at her high school are more likely to bring a bag lunch than younger students, because they have grown tired of cafeteria food. she takes a simple random sample of 80 sophomores and finds that 52 of them bring a bag lunch. a simple random sample of 104 seniors reveals that 78 of them bring a bag lunch. letting p1= proportion of sophomores who bring a bag lunch, and p2= proportion of seniors who bring a bag lunch, phoebe tests the hypotheses
General
4 months ago
Is 2 , -5 a solution to this system equation 2x + 5y = -19, 6y - 8x = -54 .? Justify your answer
General
4 months ago
The ratio of boys to girls in a class is 5:7. There are 36 students in the class. How many students are boys?
General
4 months ago
Lightbulbs i. a room has three lightbulbs. each one has a 10% probability of burning out within the month. the next exercise refers to this. what is the probability that at the end of the month at least one of the bulbs will be lit? write the probability as a percentage. (fill in the blank below and round your answer to 1 decimal place.) the probability that at the end of the month at least one of the bulbs will be lit is 0.1 %.
General
4 months ago
Marco solves the equation 4sin(3x) + 0.25 ≤ 2sin(3x) − 0.3 by graphing y = 2sin(3x) and y = −0.55. he then locates the intervals on which 2sin(3x) is less than or equal to −0.55. is marco's solution method valid? explain.
General
4 months ago
A student concluded that the solution to the equation √2x+1+3=0 is x=4.Do you agree? Explain why or why not?
General
4 months ago
Katrina wants to estimate the proportion of adults who read at least 10 books last year. to do so, she obtains a simple random sample of 100 adults and constructs a 95% confidence interval. matthew also wants to estimate the proportion of adults who read at least 10 books last year. he obtains a simple random sample of 400 adults and constructs a 99% confidence interval. assuming both katrina and matthew obtained the same point estimate, whose estimate will have the smaller margin of error? justify your answer.
General
4 months ago
How to convert 3.248 repeating decimal with 48 repeating into a simplified fraction
General
4 months ago
￼ Question:A certain type of bacteria doubles in population every hour. Their growth can be modeled by an exponential equation. Initially, there are 15 bacteria colonies present in the sample. A. Find an equation to model the bacteria growth.B. How many colonies are present after 3 and a half hours?C. When will there be 584 colonies present?
General
4 months ago
Which of the following is true about an isosceles trapezoid? The bases are not congruent. The diagonals are not congruent. The diagonals bisect each other. The diagonals are congruent.
General
4 months ago
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