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please help me on these two questions!!!!
General
10 months ago
Ursula and her friends are playing hoop rolling. Ursula rolls a large hoop along the ground. The hoop rotates through an angle of 3/2 times pi radians in 1 second. How many revolutioins does the hoop make in one minute?
General
10 months ago
if n is parallel to m find the value of x and the value of y?
General
10 months ago
In a large university the average age of all the students is 24 years with a standard deviation of 9 years. a random sample of 36 students is selected.a.determine the standard error of the mean.b.what is the probability that the sample mean will be larger than 19.5?c.what is the probability that the sample mean will be between 25.5 and 27 years?
General
10 months ago
100a×1000b can be written in the form 10w.Show that w=2a+3b
General
10 months ago
The hypotenuse and one of the legs of a right triangle form an angle that has a cosine of 2 2 . what is the measure of the angle?a.30 degreesb.45 degreesc.60 degreesd.90 degrees
General
10 months ago
There are only blue cubes,yellow cubes and green cubes in a bag.There are twice as many blue cubes as yellow cubes and four times as many green cubes as blue cubes.Hannah takes at random a cube from the bag.Work out the probability that Hannah takes a yellow cube
General
10 months ago
Are women's feet getting bigger? retailers in the last 20 years have had to increase their stock of larger sizes. wal-mart stores, inc., and payless shoesource, inc., have been aggressive in stocking larger sizes, and nordstrom's reports that its larger sizes typically sell out first. assuming equal variances, at α = .025, do these random shoe size samples of 12 randomly chosen women in each age group show that women's shoe sizes have increased? born in 1980: 8 7.5 8.5 8.5 8 7.5 9.5 7.5 8 8 8.5 9 born in 1960: 8.5 7.5 8 8 7.5 7.5 7.5 8 7 8 7 8 click here for the excel data file (a) choose the appropriate hypotheses assuming equal variances at α = .025.a. h0: μ1960 – μ1980 ≥ 0 vs. h1: μ1960 – μ1980 < 0. reject h0 if tcalc < –2.074.b. h0: μ1960 – μ1980 ≤ 0 vs. h1: μ1960 – μ1980 > 0. reject h0 if tcalc > –2.074.c. h0: μ1960 – μ1980 ≥0 vs. h1: μ1960 – μ1980 < 0. reject h0 if tcalc < 2.074.d. h0: μ1960 – μ1980 ≤0 vs. h1: μ1960 – μ1980 > 0. reject h0 if tcalc < 2.074. a b c d (b) the average shoe size of women has increased. false true
General
10 months ago
a jewelry company prints a hidden watermark on the logo of all its official documents. the watermark is a chord located 0.7 cm. from the center of a circular ring that has a 2.5 cm. radius. what is the length of the chord to the nearest tenth? Answer ASAP please!!!
General
10 months ago
Florian and michelle are trying to construct a triangle. florian says the side lengths could be 6, 8, and 10, and the angles of the triangle should have measures of 37°, 53°, and 90°. michelle says the side lengths could be 7, 7, and 14, and the angles should have measures of 35°, 65°, and 80°. which of the friends has the correct measurement for the triangle? how do you know? florian has the correct side lengths because they are all even numbers. florian has the correct side lengths because the measurements fit the triangle inequality rule. michelle has the correct side lengths because they are not all even numbers. michelle has the correct side lengths because their measurements fit the triangle inequality rule.
General
10 months ago
Amanda and ben are in different statistics classes. amanda scores a 15 on a quiz. her classmates have a mean of 20 and the standard deviation of 5 on the quiz. ben scores a 70 on a quiz. his classmates have a mean of 75 and a standard deviation of 10 on the quiz. who did better relative to their classmates?
General
10 months ago
A math class has 4 girls and 4 boys in the seventh grade and 3 girls and 5 boys in the eighth grade. the teacher randomly selects a seventh grader and an eighth grader from the class for a competition. what is the probability that the students she selects are both girls? write your answer as a fraction in simplest form.
General
10 months ago
A rectangle is twice as long as it is wide. if its length is increased by 4 cm and its width is decreased by 3 cm, the new rectangle formed has an area of 100 cm2. find the dimensions of the original rectangle.
General
10 months ago
A person's rectangular dog pen for his dog must have an area of 200 square feet. also, the length must be 20 feet longer than the width. find the dimensions of the pen.
General
10 months ago
A pennant is shaped like a right triangle, with hypotenuse 10 feet. the length of one side of the pennant is two feet longer than the length of the other side. find the length of the two sides of the pennant.
General
10 months ago
A circular pizza is divided into eight equal slices. the outer edge of the crust from one piece measeores 5.5 inches. what is the diameter of the pizza to the nearest inch?
General
10 months ago
PLZ HELP ASAP!!!Describe the transformations.A. The yellow circle was translated left 2 units and up 2 units. B. The yellow circle was reflected over both axes. C. The yellow circle was reflected over the y -axis and translated up 2 units. D. The yellow circle was reflected over the x -axis and translated left 2 units. Describe the transformations.A.The yellow triangle was reflected over both axes.B. The yellow triangle was translated right 3 units and down 4 units.C. The yellow triangle was translated down 4 units down and left 3 units.D. The yellow triangle was reflected over the x -axis and translated right 3 units.If the following parallelogram is reflected over both axes, its image will be in the same location.True or False?
General
10 months ago
The mode of a data set is the measure of center _____. that is the value that occurs with the greatest frequency that is the value midway between the maximum and minimum values in the original data set that is found by adding the data values and dividing the total by the number of data values that is the middle value when the original data values are arranged in order of increasing (or decreasing) magnitude
General
10 months ago
Vector v1 is 6.6 units long and points along the negative x axis. vector v2 is 8.5 units long and points at + 55° to the positive x axis. (a) what are the x and y components of each vector? (b) determine the sum v v 1 2
General
10 months ago
The length of a rectangular floor is 1 meter less than twice its width. if a diagonal of the rectangle is 17 meters, find the length and width of the floor.
General
10 months ago
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