# Posts by Grace

Total # Posts: 667

math
A certain printer can print at the rate of 80 characters per sound, and there is an average of 2,400 characters per page.If the printer continued to print at this rate, how many minutes would it take to print an M-page report? a) m/30 b) m/60 c) m/2 d) 2/m e) 60/m

Math
If point A is (-3,-2) and point B is (5,5) then what is the length of segment AB to the nearest tenth?

Math
The radius of the small circle A is one-half the radius of the large circle B.WHat is the ratio of the area of the small circle to the area of the large circle?

Math
If a line L with a slope of -2/5 passes through the points (5,0) and (x,-2) then what is the value of x?

Math
To the nearest tenth,what is the circumference of a circle with an area of 49pi?

Math
If Jack's house is 7.1 miles due north of the Senior Citizen Center and Belinda's house is 6.3 miles due west of it, then to the nearest tenth,what is the shortest distance between their houses?

Math
a square in a circle with a radius of 2 pi .What is the perimeter of the square?

math
13/225

math
What is the probability that a randomly selected three-digit number has the property that one digit is equal to the product of the other two? Express your answer as a common fraction.

math
if there are 10 more girls than boys in a club with 60 members, how many are boys?

math
35/27

Pre algebra
How do I solve Quadratic equations by factoring? (for example how would I solve n2 - 10n = -21 if I was supposed to get the answers 7 and 3?

Humanities
Explain the focus on the idea of natural law as an extension of human nature during the conclusion of the seventeenth century.

Math
Carl owe the workers 80hours pay 2 days at 8hours a day is 16 hours day (3)work only 4 hours Total hours work 20 " for 4 workers working 20 hours =20 X 4 =80 hours pay

Science
Please may you find a labeled diagram of a weather thermometer.

Math

Math
If a letter is chosen at random from the word PRESEVERANCE,what is the probability that the letter choosen is E?

statistics
On an exam whose scores followed a normal distribution, a student's z-score was +2. What percentage of students scored better than he did? (Use the 68-95-99.7 Rule.)

noun
if two dices are tossed together, the probability that the product will be less or equal to 18 what?

Chemistry
Are hybridized orbitals used to explain the fact that the four bonds in methane are equivalent? If not, what is?

Chemistry
The pH of a 0.100 M solution of an aqueous weak acid (HA) is 4.00. What would the Ka for the weak acid be?

physics
tommy builds a human sling shot that has an elastic constant of 4000 N/m. He puts his little sister in it and pulls it back for 5 meters. How much energy does his 25 kg sister have as she leaves the sling shot and how fast is she flying?

maths
Please I want to know how many litres make a metric tone.

STATISTICS
.868

physics
How would one plug the gravitational constant into an equation? To be honest, I'm having a hard time with the idea of the gravitational constant in general, but I need to solve an equation for the circular velocity of a galaxy. I know I need to multiply the gravitational ...

Simon went to the store to buy new school supplies. Simon spent 1/4 of his money on pencils and paper and 1/2 of his money on a backpack. If Simon has \$12.50 leftover, how much did the backpack cost?

Math
There are 24 students in Mrs.Smith's 1st block class. 1/4 of the class passed the math test with an A. 12 students in the class passed the math test with a B. What percent of the students in the class passed the test?

Math
There are 24 students in Mrs.Smith's 1st block class. 1/4 of the class passed the math test with an A. 12 students in the class passed the math test with a B. What percent of the students in the class passed the test? ****** This is how I slove the problem, but I stuck in ...

physical science
120ml of a solution whose concentration is 30g/ml was diluted with distilled water by raising its volume to 160cm3. Calculate the concentration of the new solution.

Algebra 2
did you ever get this answer?

statistics
0.215

chemistry
Pls promise where is the valuefor r in that question

math
I have a question. I think I'm wrong, so I want to ask if it's right. If I do 3/4 x 1 5/6 x 7/4 x (-2 3/8) would the answer be negative?

chemistry
2C3H7OH + 9O2 >> 6CO2+8H2O

Math
Given h(r) = 1/(r + 2), find: h(x^2) + 1 Thank You

math
the chef at a restaurant bought 37 pounds of salad for \$46.25. how much did she pay for 1 pound of salad

chemistry
9.5 g Butane + 34.0 g Oxygen = 43.5 Then 43.5 - 28.7 g CO2 = 14.8 That is the answer: 14.8 g

Precalc
An ellipse has this Cartesian equation: ((x-2)/5)^2 + ((y-4)/3)^2 = 1 Find the focal radius Find the eccentricity Write the parametric equations for the ellipse Transform into the form, Ax^2 + By^2 + Cx + Dy + E = 0

Precalc
A hyperbola has this Cartesian equation: -((x-2)/5)^2 + ((y+1)/3)^2 = 1 A. Find direction in which it opens. Horizontal? B. Find the coordinates of the center. I think it's (-2,1) or (1,-2)? C. Find the slopes of the asymptotes: m=+- ?

Precalc
The figure shows the pre-image and first iteration for a set of transformations. If the iterations are carried on infinitely, the resulting fractal figure will have dimension given by Dimension=(LogN)/Log(1/r) It tells me to find N and r... What should I be looking for on the ...

Precalc
Thank you so so so much! I've been stuck on this for hours!

Precalc
The figure shows a 10 x 10 square centered at the origin. The darker-shaded square is the image of this square, dilated by a factor of 0.8 and rotated about the origin by exactly the number of degrees, , so that its corners touch the sides of the parent square. The corners of ...

11/15 feet long per piece. Or 8.8 inches.

Precalc
For this matrice, [[0.9cos(-30), 0.9cos(60), 2] [0.9sin(30), 0.9sin(60), 4] [0, 0, 1]] What is the rotation (in degrees) and is it clockwise or counterclockwise? I think it's 30 degrees clockwise...Is that right?

Precalc
I think it's [[2,4,6,4] [4,5,4,1] [1,1,1,1]] Is that correct?

Precalc
Write a 3 x 4 pre-image matrix for a kite with the points (2,4) (4,5) (6,4) and (4,1)

Precalc
I have: A. vector n= 3*vector i + 2*vector j + 5* vector k B. vector v= 7*vector i + 10*vector j + vector k C. 52.46 degrees And I'm not quite sure for D...

Precalc
Given the plane 3x+2y+5z=54 and the points P0(6, 8, 4)[on plane] and P1(13, 18, 5) [not on plane] A. Find vector n, a vector normal to the plane B. Find vector v from P0 to P1 C. Find the angle between vector n and vector v D. Find p, the scalar projection of vector v on ...

Precalc
Is it just ((6/11), (9/11), (2/11)) ?

Precalc
Yeah, sorry about that. There's a diagram to it and I wasn't sure how else to explain it.

Precalc
A line in space has the vector equation shown here. Fill in the blanks to find the position vector to the fixed point on the line that appears in the equation: vector r=(5+(6/11)d)vector i + (3+(9/11)d)vector j + (7+(2/11)d)vector k vector v= _____ vector i + _____ vector j + ...

Precalc
Ah. Alright, I think I understand.

Precalc
Thanks so much!

Precalc
I wish I could say that's why I don't understand this problem. But sadly, I still don't get it. Haha.

Precalc
In the problem before it says r(x)= (x^5 - c^5)/(x-c) Maybe it's referring to that? Does that help?

Precalc
By appropriate calculations, show that: lim r(x)=5c^4 (x->c)

Precalc
If α, β, and γ are direction angles for a vector in three dimensions and cos α = 0.6 and cos β = 0.7, find cos γ

Precalc
Suppose vector a is 3 units long, the magnitude of vector b is 1 units and cos (θ) = -0.3, where θ is the angle between the two vectors when they are placed tail-to-tail. What does the inner product of vector a and vector b equal?

world history
The dominant political philosophy in the Qin Dynasty was legalism.

Precalc
At the point were a line intersects a plane [with the equation (24x+32y+40z=480) and three points of A(5, 10, 1), B(6, 3, 6), and C(12, 1, 4)], the vector i-, vector j-, and vector k-coefficients of the line equal the corresponding values of x, y, and z for the plane. By ...

Precalc
Thank you (:

Precalc
Assume that points A(5, 10, 1), B(6, 3, 6), and C(12, 1, 4) are on a plane. Find vector AB and vector AC.

Precalc
Assume that points A(5, 10, 1), B(6, 3, 6), and C(12, 1, 4) are on a plane. Find vector AB and vector AC.

statistics
In 2005, about 233 million people in the United States were aged 14 or older. They consumed, on average, 2.23 gallons of alcohol per person. use scientific notation to estimate the total number of gallons of alcohol consumed by this age group.

Science
What do polar bears and automobiles have in common?

Math
Solve: ((10)/(x^2-3x+45))=x+1

Living environment
diffusion

Algebra 2 Problem
You own a computer store selling two types of laser printers. The first type,A, costs \$141 and you make a \$45 profit on each one. The second type,B, costs \$110 and you make a \$35 profit on each one. You expect to sell at least 100 laser printers this month and you need to make...

Physical Science
a 30 kg girl and a 25 kg boy face each other on a friction-free blades. The girl pushes the boy, who moves away at a speed of 1.0 m/s. The girls speed is __________m/s

environmental science
describe and compare total resource use per capita in developed and developing countries

math
in the month of May, ronald earned \$4.36 in interest on his saving account. if his interest rate is 0.2%, how much money was in his account during the month?

Biology
Which internal organs of the fetal pig appear to have the greatest amounts of blood supplied to them? Why does this make sense?

Biology
Is the pancreas an exocrine or endocrine gland? Indicate the anatomical evidence on your fetal pig. What are its contributions to digestion and where are they added to the digestive tract?

earth
Which process could lead directly to the formation of pumice rock?

chemistry thank you
concentrated sulfuric acid has a density of 1.84 g/ml. calculate the mass in grams of 1.00 liter of this acid

physics!
The driver of a 1560 kg automobile traveling at 24 m/s on a leve, paved road hits the brakes to stop for a red light. determine the distance needed to stop the car if the coefficient of friction between the car tires and the road is .80 -one of the steps required of me to ...

algebra
how to figure 75% of 620

biology
explain why the synthesis of proteins, DNA and RNA requires energy. thanks :)

biology
thanks again!

biology
outline why energy is needed for each of these processes: a. the transport of sucrose in a plant b the transmission of an action potential along a nerve axon c. the selective reabsorption of glucose from a kidney nephron I'm not exactly sure how I'm supposed to answer ...

Biology
What are two major flaws in the Phylogenetic Tree System?

chemistry
thanks

chemistry
in emission spectrum which one has a highest frequency and highest energy is it blue red or violet? which one is the lowest?

math
what will i answer if the question is " identify the symmetry" is it even/odd FUNCTION or Even/odd SYMMETRY?

chemistry
yes, it's all about emission spectrum..

chemistry
does elements with low energy have high frequency?

Chemistry
What is the Wavelength( in nm) of the least energetic spectral line in the infrared series of the H atom? I don't understand how to find the least energetic spectral line?

physics
A man pushing a mop across a floor causes the map to undergo two displacements. The first has a magnitude of 200 cm and makes an angle of 120° with the positive x axis. The resultant displacement has a magnitude of 240 cm and is directed at an angle of 60.0° to the ...

Chemistry
Covalent bonds in a molecule absorb radiation in the IR region and vibrate at characteristic frequencies. a) The C---O bond absorbs radiation of wavelength 9.6um. What frequency (in s-1) corresponds to that wavelength? b) The H---Cl bond has a frequency of vibration of 8....

Chemistry
I don't understand that process, since the answer for the meters is supposed to be 316m

Chemistry
An AM station broadcasts rock music at "950 on your radio dial" Units for AM frequencies are given in kilhertz(kHz). Find the wavelength of the station's radio waves in meters, nanometers, and angstroms.

Chemisty
Calculate the energy in radiation of wavelength 550 nm carried by 1) one photon 2) 1 mol of photons

Chemisty
Calculate the energy in radiation of wavelength 550 nm carried by 1) one photon 2) 1 mol of photons

Math
Like decimals, charts, fractions, estimating. At least that is what I had in 5th.

SAT math
If five distinct lines lie in a plane, then at most how many distinct points can lie on two or more of these lines? 6 7 8 9 10.

algebra
TGIF. Chris and Terry have been trying to live within their budget but miss going out to dinner on Friday nights. They decide not to spend any nickels or quarters they receive as change for a month and save these in a jar. At the end of the second week they have a total of 165...

math
Write the equation of the line satisfying the given condition. Parallel to y = (2/3)x +1 and passing through the point (0, -3). (Hint: Parallel lines have the same slope

algebra
Write the equation of the line satisfying the given condition. Perpendicular to y = 4x + 2 and passing through the point (0, -4) (Hint: Slopes of non-vertical perpendicular lines are negative reciprocal of each other.)

algebra
Solve the inequality algebraically. Graph your solution on a number line.

math
Suburban Population. The following charts show the populations for two suburbs from 1980 to 1990, where x = 0 correspond to 1980, x = 2 correspond to 1982, and so on. Year x Suburb 1 y Year x Suburb 2 y 0 12,690 0 23,112 2 12,071 2 23,893 4 13,463 4 24,674 6 13,867 6 25,455 8 ...

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