All Questions

127

math

the ratio of the lengths of stings that play thenotes f and g is 9 to 9. If a string 40 centimeters long plays a g, what is the lenght of the string that plays an F?

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Guest Feb 13, 2020

188

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A deck of cards has 5 pink, 2 gray, and 6 black cards. You pick 2 cards from the deck without replacement. What is the probability that the first card is gray and the second card is pink?

AnimalMaster ●●●●●●●

Guest Feb 13, 2020

339

There are 175 baskets of fruit in the supermarket. 13 baskets of them are bananas. What percent of the baskets are not bananas?

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Guest Feb 13, 2020

160

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Peanuts sell for $3.00 per pound. Cashews sell for $6.00 per pound. How many pounds of cashews should be mixed with 12 pounds of peanuts to obtain a mixture that sells for $4.20 per pound?

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Guest Feb 13, 2020

141

Let P(E) = 0.5, P(F) = 0.35, and P(F ∩ E) = 0.25. Draw a Venn diagram and find the conditional probabilities.

Let P(E) = 0.5, P(F) = 0.35, and P(F ∩ E) = 0.25. Draw a Venn diagram and find the conditional probabilities.

1) P(E | Fc )
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Guest Feb 13, 2020

152

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Two points are selected randomly on a line of length L so as to be on opposite sides of the midpoint of the line. [In other words, the two points X and Y are independent random variables such that X is uniformly distributed over (0, L/2) and Y is uniformly read more ..

Guest Feb 13, 2020

442

geometry proof

I'm unsure how to solve this, please help:

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Guest Feb 13, 2020

181

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A traffic light at a certain intersection is green 55% of the time, yellow 10% of the time, and red 35% of the time. A car approaches this intersection once each day. Let Y denote the number of days up to and including the third day on which a red light read more ..

Guest Feb 13, 2020

196

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The length of a rectangle is 12 centimeters less than its width. What are the dimensions of the rectangle if it’s area is 85 square centimeters?

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Guest Feb 13, 2020

482

+27

In a certain clothing store, 6 shirts and 3 ties cost $79.50, and 3 shirts and 2 ties cost $41. Determine the cost of each tie.

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veraguitars1234 Feb 13, 2020

207

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A blimp provides aerial television views of a baseball game. The television camera sights the stadium at a 7degrees angle of depression. The altitude of the blimp is 300m. What is the line-of-sight distance from the television camera to the base of the read more ..

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Guest Feb 13, 2020

638

Please help, I'm truly stuck and I'm sick

1) In triangle $WXY,$ $WX = 8$ and $XY = 14.$ The circumcircle of triangle $WXY$ is constructed. The tangent to the circumcircle at $X$ is drawn, and the line through $W$ parallel to this tangent intersects $\overline{XY}$ at $Z.$ Find $YZ.$
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Guest Feb 13, 2020

196

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Suppose that 80 percent of all statisticians are shy, whereas only 15 percent of all economists are shy. Suppose also that 90 percent of the people at a large gathering are economists and the other 10 percent are statisticians. If you meet a shy person read more ..

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Guest Feb 13, 2020

159

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In 4 hours, an experienced cook prepares enough pies to supply a local restaurant's daily order. Another cook prepares the same number of pies in 7 hours. Together with a third cook, they prepare the pies in 2 hours. Find how long it takes the third read more ..

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Guest Feb 13, 2020

224

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A(−1, 1), B(2, 3), C(2, 1) 90∘ counterclockwise about vertex A

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Guest Feb 13, 2020

263

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You survey 127 employees, and learn that the number one thing on their wish list is free coffee. If 100 employees drink on average 1.5 cups of coffee a day and the cost is $.40 per cup, how much will it cost the company to offer free coffee for the year read more ..

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Guest Feb 13, 2020

134

expected value problem

Three players enter a room and a red or blue hat is placed on each person's head. The color of each hat is determined by a coin toss, with the outcome of one coin toss having no effect on the others. Each person can see the other players' hats but not his read more ..

Guest Feb 13, 2020

237

help

The distribution of SAT scores is normal with a mean of µ = 500 and a standard deviation of σ = 100. a. What SAT score (i.e., X score) separates the top 15% of the distribution from the rest?b. What SAT score (i.e., X score) separates the top 10% of the read more ..

ElectricPavlov ●

Guest Feb 13, 2020

191

math

A kite forms a 25° angle with the ground. The wind picks it up so that it then forms a 74° angle with the ground

off-topic

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Guest Feb 13, 2020

213

help

A Can Complete a work in 12 days and B Can Complete in 8 days. A works for 8 hrs every day while works for 10 hours every day. If A and B together start wooking & his Perday, in how many days will they complete the work?

ElectricPavlov ●

Guest Feb 13, 2020

226

help

Jane is taking two courses. The probability she gets an A in the first course is 0.7. The probability she she gets an A in the second course is 0.8. The probability she gets an A in at least one of the courses is 0.9. What is the probability of passing read more ..

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Guest Feb 13, 2020

455

+313

Let n be a positive integer. (a) Prove that by counting the number of ordered triples (a, b, c) where in two different ways. (b) Prove that

Let n be a positive integer.
(a) Prove that
by counting the number of ordered triples (a, b, c) where in two different ways.
(b) Prove that
by counting the number of subsets of containing three different numbers read more ..

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mathmathj28 Feb 13, 2020

233

+313

A stick is 5 inches long. It is broken at two points, chosen at random. What is the probability that all three pieces are longer than 1 inch

A stick is 5 inches long. It is broken at two points, chosen at random. What is the probability that all three pieces are longer than 1 inch?

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mathmathj28 Feb 13, 2020

980

+313

Let triangle ABC be equilateral, where the side length is 3. A point D is chosen at random inside the triangle.

Let triangle ABC be equilateral, where the side length is 3. A point D is chosen at random inside the triangle. What is the probability that the length AD is at most 1?

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mathmathj28 Feb 13, 2020

All Questions ⁺⁰184023 Questions

math

help

There are 175 baskets of fruit in the supermarket. 13 baskets of them are bananas. What percent of the baskets are not bananas?

help

Let P(E) = 0.5, P(F) = 0.35, and P(F ∩ E) = 0.25. Draw a Venn diagram and find the conditional probabilities.

help

geometry proof

help

help

In a certain clothing store, 6 shirts and 3 ties cost $79.50, and 3 shirts and 2 ties cost $41. Determine the cost of each tie.

help

Please help, I'm truly stuck and I'm sick

help

help

Help

help

expected value problem

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math

help

help

Let n be a positive integer. (a) Prove that by counting the number of ordered triples (a, b, c) where in two different ways. (b) Prove that

A stick is 5 inches long. It is broken at two points, chosen at random. What is the probability that all three pieces are longer than 1 inch

Let triangle ABC be equilateral, where the side length is 3. A point D is chosen at random inside the triangle.

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