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Tom

Questions (686)

If real numbers a and b satisfy a^2 + b^2 = 64, what is the distance between the lines ax + by = 1 and ax + by = 417 ?
1. 0 answers
2. 391 views
Sam measured the length of an insect. He found it was between 3 1/2 inches and 3 3/10 inches long. Write a mixed number that
1. 1 answer
2. 689 views
What is the maximum value of[9sinθ+2sin(θ+π/3)]^2?
1. 2 answers
2. 493 views
Four players are playing a game involving choosing positions on a grid of size 3×8. Each player chooses a random position on
1. 0 answers
2. 771 views
The price of a hat is reduced by a% from its regular price, and then is raised by a% from the reduced price. If the resulting
1. 1 answer
2. 434 views
θ is an acute angle such that tan(θ) = 12. What is the value of 5√5⋅(sinθ+cosθ)?
1. 1 answer
2. 367 views
In triangle ABC, we have AB = 16, BC = 29 and CA = √1097. What is the integer that is closest to 100 sin∠ABC?
1. 1 answer
2. 387 views
Identify six renewable (as opposed to depleted) sources of energy.
1. 1 answer
2. 837 views
for either standard form of the parabola, describe what happens to the shape of the parabola as p increases
1. 1 answer
2. 390 views
A rectangular livestock pen with THREE SIDES of fencing is to be built against the barn. The fencing is 1050ft long. Find the
1. 1 answer
2. 975 views
A child’s kite is on top of a straight pine tree. A ladder is placed against the tree and touches the kite. The ladder forms a
1. 1 answer
2. 673 views
Need help with these:Write the expression as a logarithm of a single quality. a) 3log[base5](a) + 4log[base5](b) -
1. 2 answers
2. 642 views
Tom decides to make a rectangular desk top from a plywood door that was stored in the basement. The door was 2 feet longer than
1. 1 answer
2. 539 views
Flight Path. In this problem you will use a cosine function to model the flight path of a plane that begins its descent from
1. 0 answers
2. 457 views
A firm issues bonds with a face value of 1000, a coupon rate of 7% and that will mature in 10 years and the market yield is 10%
1. 0 answers
2. 506 views
Hello,I don't know what test to use for this series: Determine the sum of the following series: inf E n=1 (2^n + 9^n) / 12^n
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2. 374 views
Randy throw a base ball straight upwards, releasing it 6 ft above the round, and giving it an initial speed of v = 128 ft/sec.
1. 1 answer
2. 473 views
A truck of mass 13,100 kg is acted upon by a driving force of 8900 N. The motion is opposed by a frictional force of 2230 N.
1. 1 answer
2. 1,113 views
integrate e^(2x) / (e^(4x) + 9)am I allowed to simplify the e^(2x) with the e^(4x)? Thank you
1. 2 answers
2. 404 views
Hello, I have a question concerning trigonometric substitution.let's say we have integral of dx/sqrt(9x^2 + 4), so after doing a
1. 2 answers
2. 1,122 views
If the digits of a number may be any one of 0 through 9 (except the first digit cannot be zero), and the system of alternating
1. 0 answers
2. 517 views
I have this integral that I don't know how to solve:∫ (x-3)/sqrt(x) Would I multiply both parentheses first? or just turn it
1. 2 answers
2. 359 views
Using an upper-case "C" for any arbitrary constants, find the general indefinite integral∫ (-2-t)(-9-t^2) dt Now I multiplied
1. 2 answers
2. 2,293 views
find the derivative of:g(x) = interal(a=7x, b=6x) (u+5)/(u-5) du Hint: interal(a=7x, b=6x) (u+5)/(u-5) du = interal(a=0, b=6x)
1. 3 answers
2. 847 views
Suppose you have a very long straw that can reach from a cup of water on the ground level to the top of avery tall building.
1. 1 answer
2. 904 views
Hello everyone,I have made measurements of the periods of a pendulum attached to a stationary point at a certain height h. When
1. 2 answers
2. 435 views
How many joules ar required to heat a frozen can of juice (360 grams) from -5 degrees C (the temp of an overcooled refrigerator)
1. 1 answer
2. 892 views
Amy age 8 27kg 127cmBruce age 12 41kg 149cm Both Amy and Bruce are learning gymnastics and having trouble being able to get
1. 0 answers
2. 477 views
To make an orange dye, 4 parts of red dye are mixed with 3 parts of yellow dye. To make a green dye, 2 parts of blue dye are
1. 1 answer
2. 963 views
According to the statistics of a famous high school in Canada, all their graduates went to either A or B for university study.
1. 0 answers
2. 774 views
A 2.50 kg wheel has a diameter of 20.0 cm and is rotating at 3600 rpm. A force acts on it causing it to come to a rest in 10.0
1. 1 answer
2. 401 views
The position of an object connected to a spring varies with time according to the expression x = (7.1 cm) sin (2.1π t). Find(a)
1. 1 answer
2. 7,356 views
The boom of a crane is 20 m long and is inclined 20ᵒ from the horizontal. A bucket of cement with a mass of 3000 kg is
1. 2 answers
2. 3,080 views
help me solve this equation by substitution.y^2− 4x^2 = 7 9y^2+16x^2 = 323
1. 1 answer
2. 1,119 views
How do I change 3,3,4,4,5,5-hexamethyl-1-hexyne into it's molecular formula
1. 1 answer
2. 310 views
Use Taylor’s Estimate to bound the error of the n-th order Maclaurin approximation of sin(a), wherea 2 [&#56256;&#56320;�; �].
1. 0 answers
2. 447 views
For a glass lens submerged in water (n=1.33), the critical angle of incidence at which total internal reflection begins to
1. 1 answer
2. 1,138 views
What force must be applied to push a carton weighing 350 N up a 19° incline, if the coefficient of kinetic friction is 0.45?
1. 1 answer
2. 625 views
What force must be applied to push a carton weighing 350 N up a 19° incline, if the coefficient of kinetic friction is 0.45?
1. 1 answer
2. 574 views
What force must be applied to push a carton weighing 350 N up a 19° incline, if the coefficient of kinetic friction is 0.45?
1. 0 answers
2. 532 views
A centrifuge in a medical laboratory rotates at an angular speed of 3500 rev/ min. When switched off, it rotates through 41.0
1. 1 answer
2. 1,241 views
What force must be applied to push a carton weighing 350 N up a 19° incline, if the coefficient of kinetic friction is 0.45?
1. 1 answer
2. 579 views
If 7x + 5 = -2, find the value of 8x.
1. 2 answers
2. 703 views
If 7x + 5 = -2, find the value of 8x.
1. 1 answer
2. 482 views
Dear sir, madam,I am having a little problem with the solution my chemistry book gives on the following problem: We have a
1. 1 answer
2. 493 views
�ÚABC ~= �ÚACBBD perpendicular AC The sum fo the three angles in any triangle is 180 degree. Prove: m�ÚCBD = 1/2 m�ÚBAC
1. 2 answers
2. 482 views
Vector , which is directed along an x axis, is to be added to vector , which has a magnitude of 5.0 m. The sum is a third vector
1. 2 answers
2. 761 views
A monkey is hanging from a branch located exactly 24 meters along the ground from the hunter. The monkey is 14 meters above the
1. 0 answers
2. 797 views
Find the pattern and fill in the blank.94 26 ___ 14 10
1. 2 answers
2. 455 views
Will you please check my grammar? Thanks!In a one-page, typed essay, describe what you would do if you were the governor of your
1. 3 answers
2. 633 views
Known factors-weight 105 g---speed at start 60 mph---distance traveled 70 yds.Questions ,what is the rate of decelleration?, At
1. 1 answer
2. 414 views
How much heat is needed to be supplied to a 3.5 kg cylindrical rod if its volume changes by 1/4 of its original size? Assume
1. 2 answers
2. 351 views
A 4.7 g bullet is fired horizontally into a 0.50 kg block of wood resting on a frictionless table. The block, which is attached
1. 1 answer
2. 684 views
What is the maximum theoretical efficiency of a steam engine operating between 60°C and 410°C?
1. 1 answer
2. 723 views
y=cos3x(sin^3)x
1. 1 answer
2. 492 views
derivative of y=tan^3(x)
1. 1 answer
2. 395 views
evaluate the limit:lim cos(x + pi/2)/x x->0
1. 1 answer
2. 433 views
Find the vector and scalar equations of the plane containing the line r=(3,5,1)+t(-2,3,1) and the point (1,2,3)
1. 1 answer
2. 1,139 views
In a classroom demonstration, a 79.2-kg physics professor lies on a “bed of nails.” The bed consists of a large number of
1. 2 answers
2. 3,908 views
The exchange rate of U.S. dollars to British pound's is .63 you have $4000 to convert to British pounds. How many British pounds
1. 1 answer
2. 1,638 views
A committee of 5 people is to be selected from student council. Council has 6 boys and 7 girls. What is the probability that the
1. 1 answer
2. 724 views
A committee of 5 people is to be selected from student council. Council has 6 boys and 7 girls. What is the probability that the
1. 1 answer
2. 1,036 views
A cat walks along a uniform plank that is 4 m long and has a mass of 7 kg. The plank is supported by two sawhorses, one 0.44 m
1. 1 answer
2. 2,854 views
A trained dolphin leaps from the water with an initial speed of 12 m/s. It jumps directly towards a ball held by the trainer a
1. 1 answer
2. 3,671 views
Lisa Kane borrowed $8000 on an 8% 60 day note. After 15 days, Lisa paid $2000 on the note. On day 45, Lisa paid $1000 on the
1. 0 answers
2. 577 views
The highest positive oxidation number that chlorine can exhibit an any compound is +7, whereas its most negative oxidation
1. 2 answers
2. 760 views
The body mass index I can be used to determine an individuals risk for heart disease. An index less than 25 indicates low risk.
1. 1 answer
2. 535 views
An electron enters a region where there is a magnetic field with a strength of 0.5 T which points out of the page (electron has
1. 2 answers
2. 634 views
What are the parts for the sentence "How many players are on a team?"
1. 1 answer
2. 336 views
A manufacturer wants to increase the absorption capacity of a sponge. Based on past data, the average sponge could absorb 3.5
1. 1 answer
2. 1,457 views
I just wanted to see if my answer if correctthe integral is: ∫(7x^3 + 2x - 3) / (x^2 + 2) when I do a polynomial division I
1. 1 answer
2. 499 views
A bag of 12 white marbles and 1/3 red marbles and 2/5 blue marbles what is the total marbles in the bag?
1. 1 answer
2. 435 views
Abelardo wants to create several different 7-character screen names. He wants to use arrangements of the first 3 letters of his
1. 2 answers
2. 1,177 views
A 4.5 cm tall object is placed 20 cm in front of a spherical mirror. It is desired to produce a virtual image that is upright
1. 1 answer
2. 4,032 views
If you have 4.90 moles of Ba, how many liters of N2 would you have at STP?
1. 1 answer
2. 866 views
john has a 25 gallon fish tank. John filled his fish tank today with 24 gallons of water. the water evaporates at a rate of 1.5
1. 3 answers
2. 566 views
How do you synthesize methysulfonyl benzene from Benzene?
1. 0 answers
2. 377 views
A mass m at the end of a spring vibrates with a frequency of 0.87 Hz. When an additional 602 g mass is added to m, the frequency
1. 1 answer
2. 3,826 views
A 40 ft ladder leans against a wall so the base of the ladder is 11 feet away from the base of the wall . What angle does the
1. 2 answers
2. 812 views
hello i need help for derivative: ( sin x ) / ( cos x )thanks for your help
1. 1 answer
2. 422 views
Explain how to calculate margin of error.What effect does increasing your sample size have on the margin of error? What effect
1. 1 answer
2. 674 views
Explain how to calculate margin of error.What effect does increasing your sample size have on the margin of error? What effect
1. 0 answers
2. 514 views
A cylindrical object of volume V is immersed completely in a liquid. � is thedensity of the object and �L is the density of the
1. 0 answers
2. 849 views
A 1289 Hz sound from the speaker enters a tube at point A.It then takes two paths, ACD or ABD. Minimum sound is heard when ACD
1. 0 answers
2. 1,070 views
We had to write a conversation in Spanish between a clerk and me wanting to buy pants I wanted them to be loose and I had to pay
1. 4 answers
2. 654 views
A 1093 kg van, stopped at a traffic light, is hit directly in the rear by a 715 kg car traveling with a velocity of +2.38 m/s.
1. 1 answer
2. 629 views
A 2.80 kg steel ball strikes a massive wall at 12.8 m/s at an angle of alpha = 50.9° with the plane of the wall. It bounces off
1. 0 answers
2. 483 views
Two men pushing a stalled car generate a net force of +698 N for 7.37 s. What is the final momentum of the car?
1. 2 answers
2. 2,871 views
A 690 kg elevator starts from rest. It moves upward for 2.56 s with constant acceleration until it reaches its cruising speed,
1. 1 answer
2. 562 views
Hillary stands directly in front of speaker S1 and walks straight away (down on the page) What is the first distance (measured
1. 1 answer
2. 470 views
I just wanted to be sure if I got the answer right1. Jenny (75 kg) goes on a ski trip. She goes down a slope that's inclined at
1. 2 answers
2. 368 views
Wrote the name and subject bad in the other post, sry::Hello, this is the last question that I can't seem to be able to solve:
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2. 409 views
Dawn is writing a computer program to find the salaries of her employees after their annual raise. The percentage of increase is
1. 1 answer
2. 609 views
2 blocks are in contact on a horizontal table. A force is applied on the first block at a 30* angle. The blocks move to the
1. 1 answer
2. 594 views
A car driving along a highway at a speed of 23 m/s strays onto the shoulder. Evenly spaced parallel grooves called “rumble
1. 4 answers
2. 2,498 views
What is the trend in atomic size in the series of Group IIA elements Be through Ra?
1. 1 answer
2. 1,299 views
A record has an angular speed of 47 rev/min. Through what angle does it rotate in 1.07 s? Answer in units of ra
1. 0 answers
2. 437 views
Hey Im trying to plot this set of data:0 0 10 0.6 20 1.01 30 1.428 40 2 50 2.3 60 2.57 70 2.8 80 3.05 90 3.35 100 3.54 110 3.73
1. 0 answers
2. 462 views
find the first and second derivative of:f(x) = (x+2)/e^x I get to: f'(x) = e^x - (x+2)(e^x) / (e^x)^2 I'm stuck at that
1. 4 answers
2. 386 views
considering that x is the independent variable in this equation:y + y^3 + 3 = e^y^2 + 3^x * cos(3y) - x Evaluate dy/dx I get to:
1. 1 answer
2. 580 views

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