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MATH SOLVE
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rooks are randomly placed on different squares of a chessboard. A rook is said to attack all of the squares in its row and its column. Compute the probability that every square is occupied or attacked by at least rook. You may leave unevaluated binomial coefficients in your answer.
General
2 months ago
Meredith invested $5,500 into an account that earned 5% interest per year. When she cashed out the investment to use it as a down payment for a new car, it was worth a total of $7,739.05.Which equation describes Meredith's investment based on t, the number of years she kept the account open?
General
2 months ago
Temperate is usually measured on the Fahrenheit scale or the Celsius scale. Use the formula f=1.8c+32 to convert from one scale to the other. Alaska’s record low temperature in July is 16 degrees Fahrenheit. Convert this temperature to degrees Celsius
General
2 months ago
Look at the figure, . Find the m∠H .106°42°36°74°
General
2 months ago
Use the Integral Test to determine whether the series is convergent or divergent [infinity] Σne−15n n = 1 In order to apply the Integral Test for the function f(x) on the interval [a, [infinity]), it must be true that (choose all that apply) a. f must be continuous. b. f must be differentiable. c. f must be positive. d. f must be negative. e. f must be increasing. f. f must be decreasing.
General
2 months ago
Ruby Company produces a chair for which the standard specifies 5 yards of material per unit. The standard price of one yard of material is $7.50. During the month, 8,500 chairs were manufactured, using 43,600 yards at a cost of $7.55 per yard.
General
2 months ago
A bakery is considering whether or not to hire an extra baker for the night shift. If that baker would earn $20 per hour, work an 8-hour shift, and produce 100 pastries that would sell for $3 each, the marginal cost of producing an additional pastry is _____.
General
2 months ago
2. A box with an open top is to be constructed from a square piece of cardboard, 3 ft wide, by cutting out a square from each of the four corners and bending up the sides. Find the largest volume of the box
General
2 months ago
Suppose that the joint p.d.f. of a pair of random variables (X, Y ) is constant on the rectangle where 0 ≤ x ≤ 2 and 0 ≤ y ≤ 1, and suppose that the p.d.f. is 0 off of this rectangle. a. Find the constant value of the p.d.f. on the rectangle. b. Find Pr(X ≥ Y ).
General
2 months ago
Ms. Madison directs two choruses. One chorus has 28 students. The other Chorus has 36 students. For rehearsals, she wants to divide each chorus into the largest possible egaul groups,with no students left over. How many students will be in each group?
General
2 months ago
In this diagram, which equation could you prove to be true in order to conclude that the lines are parallel?b/a⋅c/d=−1b/a=c/db/a=d/cb/a⋅d/c=−1
General
2 months ago
Simplify. 14+{−2+3[1+3(−6−2)]} Enter your answer in the box. pls HELP
General
2 months ago
A line has a slope of -4/5. Which ordered pairs could be points on a line that is perpendicular to this line? Check all that apply.(–2, 0) and (2, 5)(–4, 5) and (4, –5)(–3, 4) and (2, 0)(1, –1) and (6, –5)(2, –1) and (10, 9)
General
2 months ago
A farmer harvested 35 acres of corn and 20 acres of beans. Animals ate 1/8 of the corn he originally planted. how many acres of corn did the farmer plant?
General
2 months ago
This set of points is on the graph of a function.{(−3, 9), (−1, 1), (0, 0), (2, 4)}Which points are on the graph of the inverse?Select each correct answer.(0, 0)(−9, 3)(4, 2)(1, −1)What is the inverse of f(x)=4x+3 ?f^−1(x)=1/4x−3/4f^−1(x)=−1/4x+3/4f^−1(x)=4x−3f^−1(x)=−4x−3What is the inverse of the function?g(x)=−4/3x+2g^−1(x)=−4/3x−2g^−1(x)=3/4x+2/3g^−1(x)=−3/4x+3/2g^−1(x)=4/3x−2Which functions are invertible?Select each correct answer. (has pictures)A.B.C.D.What is the inverse of f(x)=x4+7 for x≥0 where function g is the inverse of function f?g(x)=x+7√4 , x≥−7g(x)=x√4+7 , x≥0g(x)=x−7√4, x≥7g(x)=x√4−7 , x≥0
General
2 months ago
The mean score on a biology exam taken by all undergraduate students in a college in a particular year is 67.8 with a standard deviation of 11.5. The standard error of the mean for a sample of 70 students is , and the margin of error of the mean is . (Round off your answers to the nearest hundredth.)
General
2 months ago
Two cargo trains each leave their respective stations at 1:00 p.m. and approach each other, one traveling west at 6 miles per hour and the other on separate tracks traveling east at 14 miles per hour. The stations are 40 miles apart. Find the time when the trains meet and determine how far the eastbound train has traveled. A). 3 p.m, 28 mi B). 12 p.m., 20 mi C). 2 p.m., 18 mi. D). 1 p.m., 15 mi
General
2 months ago
The length of a rectangle is 6 1/2 inches and the width is 3 3/4 inches. What is the ratio, using whole numbers, of the length to the width?
General
2 months ago
Circle P is tangent to the x-axis and the y-axis. If the coordinates of the center are (r, r), find the length of the chord whose endpoints are the points of tangency.
General
2 months ago
The base of a cube is parallel to the horizon. If the cube is cut by a plane to form a cross section, under what circumstance would it be possible for the cross section be a non-rectangular parallelogram?
General
2 months ago
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