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A plane takes off at an angle of elevation of 15° and travels in a straight line for 3,000 meters. What is the height of the plane above the ground at this instant?
General
2 months ago
23.8 is 10% of what amount
General
2 months ago
How many flowers, spaced every 3 in., are needed to surround a circular garden with a 150-ft radius? Use 3.14 for pi.
General
2 months ago
One hundred people were surveyed about their favorite kind of yogurt. How many more people prefer chocolate than vanilla?(vanilla- 25%)(swirl-35%)(chocolate- 40%)a. 10b. 15c. 25d. 40
General
2 months ago
The ABC Book club charges a $40 monthly fee, plus $2 per book read in that month. The Easy Book Club charges a $35 monthly fee, plus $3 per book read in that month. For each club, how many books must be read in 1 month for the total charges from each club to be equal?
General
2 months ago
Tutor O-Rama claims that their services will raise student SAT math scores at least 50 points. The average score on the math portion of the SAT is μ=350 and σ=35. The 100 students who completed the tutoring program had an average score of 385 points. Is the students’ average score of 385 points significant at the 5% and 1% levels to support Tutor O-Rama’s claim of at least a 50-point increase in the SAT score? (2 pts) Is the Tutor O-Rama students’ average score of 385 points significantly different at the 5% and 1% levels from the average score of 350 points on the math portion of the SAT? What conclusion can you make, based on your results, about the effectiveness of Tutor O-Rama’s tutoring? (2 pts)
General
2 months ago
To construct a confidence interval using the given confidence level, do whichever of the following is appropriate. (a) Find the critical value z Subscript alpha divided by zα/2, (b) find the critical value t Subscript alpha divided by tα/2, or (c) state that neither the normal nor the t distribution applies.?95 % ; n=100; σ = unknown; population appears to be skewedChoose the correct answer below.A. tα/2 =2.626B. zα/2 = 1.96C. tα/2 =1.984D. zα/2 = 2.575E. Neither the normal nor the t distribution appliesTo construct a confidence interval using the given confidence level, do whichever of the following is appropriate. (a) Find the critical value z Subscript alpha divided by zα/2, (b) find the critical value t Subscript alpha divided by tα/2, or (c) state that neither the normal nor the t distribution applies.?98 % ; n= 19; σ = 21.4; population appears to be normally distributedA. zα/2 = 2.33B. tα/2 = 2.214C. zα/2 = 2.552D. zα/2 = 2.055E. Neither normal nor t distribution applies
General
2 months ago
Consider the points (3, 4) and (−3, 4). When the two points are compared, which statement is NOT TRUE? A) The y-coordinates have the same value. B) The x-coordinates have the same absolute value. C) The x-coordinates are opposite numbers. D) Both points are 4 units above the y-axis.
General
2 months ago
The scatterplot shows the distance (in feet) that a person was from a motion sensor during an experiment in math class. Use the labeled points to create a linear model. About what distance in feet (y) would a person be 8 seconds after the experiment begins?A.) 21ftB.) 27ftC.) 30ftD.) 57ft
General
2 months ago
Two sporting goods stores are having discount sales on basketballs. • At one store, a basketball is on sale for 20% off the regular price of $24.95. • At the other store, the same kind of basketball is on sale for 25% off the regular price of $25.80. What is the difference between the sale prices of the two stores?
General
2 months ago
The chickens at Colonel Thompson's Ranch have a mean weight of 1700 g, with a standard deviation of 200 g. The weights of the chickens are closely approximated by a normal curve. Find the percent of all chickens having weights more than 1560 g.
General
2 months ago
Calculating cos-1 ( help is gladly appreciated :) )
General
2 months ago
*25 BRAINLIEST FOR WHOEVER ANSWERS FIRST*Lara and Tim took different routes to travel from Point A to Point C. Lara took the route along A, B, and C. Tim took the route along A, E, D, and C. Their routes with distances and times are shown.A 5 sided figure ABCDE is shown. Point A is labeled Start and Point E is labeled End. AB is 6 miles and 1.5 hours, BC is 2 miles and 1 hour, CD is 6 miles and 1.5 hours, DE is 4 miles and 1.5 hours, and AE is 2 miles and 0.5 hourWhich person's average speed is greater?
General
2 months ago
PLEASE HELP!!!!!!!!!!!!!!!!!!!!!!!The new middle school aquarium is a rectangular prism with these dimensions:Length: 60 cmWidth: 25cmHeight: 30 cmFind how much water it will take to fill the aquarium to the top (volume).Find how much glass it will take to make the aquarium (surface area).Note: There is no “top” to the aquarium. It may help to draw a net.
General
2 months ago
4. Perform the indicated operation on polynomials.a. (4x2 + 5x - 7) + (2x2 - 7x - 3)b. (8m - 2n - 4) - (6m - 3n + 2)c. (30+4) (5c-2)
General
2 months ago
A jet plane travels 2 times the speed of a commercial airplane. The distance between Vancouverand Regina is 1730 km. If the flight from Vancouver to Regina on a commercial airplane takes140 minutes longer than a jet plane, what is the time of a commercial plane ride of this route? (please show steps:))
General
2 months ago
In a triangle, the measure of the second angle is twice the measure of the first angle. the third angel is equal to the sum of the other angels
General
2 months ago
When Mendel conducted his famous genetics experiments with peas, one sample of offspring consisted of 428 green peas and 155 yellow peas for a total of 583 peas. a) Find a 95% confidence interval estimate of the percentage of yellow peas and then interpret your answer.
General
2 months ago
A survey conducted by the U.S. department of Labor found the 48 out of 500 heads of households were unemployed. Compute a 99% confidence interval for the proportion of unemployed heads of households in the population. Round to three decimal places.
General
2 months ago
4. Perform the indicated operation on polynomials.a. (4x2 + 5x - 7) + (2x2 - 7x - 3)
General
2 months ago
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