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David
Questions and answers by
David
, page 9
Questions (1,309)
9. In Mr.chin's math class there were g girls and b boys. The number pf girls was 5 less than twice the number of boys. What is
2 answers
596 views
10.Thirty students in a chemistry class took a test on which the overall average score was 78. If the average score for 15 of
4 answers
547 views
2. If a^2-b^2=20 and a+b=2, what is the value of a-b?
I added the a^2-b^2+20 and a+b+20, but i couldn't get the answer to equal
1 answer
322 views
In set of 30 different positive integers, every number is even and/or a multiple of 3. If 22 of these numbers are even and 15
2 answers
608 views
16. If the base of a right triangle is 8 (square root)2 and the hypotenuse is 18, what is the area of the triangle?
A.14 B.14
1 answer
386 views
1. If b is a positive integer than 200, then how many integer pairs (a,b) satisfy the equation a/b= 2/9
1 answer
390 views
1. If b is positive integer less than 200, then how many integer pairs (a,b) satisfy the equation a/b= 2/9?
3 answers
369 views
18. In triangle ABC, m<C=2m<b,m<A=6m<B. what is the measure of <c?
A.5 degrees B.15 degrees C.20 degrees D.30 degrees E.40
1 answer
449 views
40. How far (in miles) does a car travel when its average rate is 35 miles per hour and it travels for 3 hours and 24 minutes?
1 answer
467 views
An automobile party leaves at 7:55 A.M., and arrives at its destination 15 miles away at 8:15 A.M. What was the average rate on
3 answers
338 views
42. Twenty minutes after a plane leaves the airport, it is reported to be 160 miles away. What average speed of the plane in the
3 answers
660 views
when you connect to a remote VPN server with your laptop running windows 8 what key item is your computer allocated
2 answers
1,135 views
The first month's dues will be used to rent a film about computer-related careers, to purchase a reference book, and to buy
3 answers
1,489 views
8-hydroxyquinoline (Q) can complex and precipitate many metals. A mixture of the aluminium and magnesium complexes weighed
4 answers
4,540 views
You deposit $100 at the end of each quarter in a sinking fund earning 4% compounded quarterly. How many quarterly deposits must
1 answer
461 views
The line 4x + ky = -1 has a slope of 2/3. Find k.
a. 3/2 b. 6 c. -3 d. -6
1 answer
410 views
Let x and y be real numbers such that x^2 + y^2 = 1. Find the maximum value of 2x - 5y.
4 answers
669 views
A meter stick has a mass of 0.12 kg and balances at its center. When a small chain is suspended from one end, the balance point
3 answers
1,751 views
A Balloon carrying a basket is descending at a constant velocity of 20.0 m/s. A person in the basket throws a stone with an
3 answers
549 views
The nozzle of a fountain jet sits in the center of a circular pool of radius 3.50 m. If the nozzle shoots water at an angle of
1 answer
496 views
8.5 Ed's = 10 Ebb's, 12 Ersk's = 100 Ed's and 5 Ebb's = 1 Zum.
How many Zum's in approx. 1 Ersk? Starts out: 1 Ersk*__________
3 answers
414 views
-5 an 7/12 divided by 12 equals
1 answer
437 views
Point C is in the interior of angle ABD. The measure of angle ABD is 40 degrees. The measure of angle DBC is 3x-5. If angle ABC
4 answers
2,478 views
If 3x+xy+4y=8, what is the value of d^2y/dx^2 at the point (1,1)? My work:
3+(x)(dy/dx)+(y)+4(dy/dx)=0 dy/dx(x+4)=-3-y
1 answer
417 views
If 3x+xy+4y=8, what is the value of d^2y/dx^2 at the point (1,1)? My work:
3+(x)(dy/dx)+(y)+4(dy/dx)=0 dy/dx(x+4)=-3-y
2 answers
502 views
Find the coordinatesof the point on the curve xy=10 in the first quadrant such that the normal line passes through the orgin.
My
4 answers
743 views
Find the point on the curve x=4y-y^2 where the tangent to the curve is a vertical line.
My work: Finding the derivative.
3 answers
589 views
Find the point on the curve x=4y-y^2 where the tangent to the curve is a vertical line.
My work: Finding the derivative.
1 answer
386 views
Find the equation of ALL horizontal tangents to the curve y^2=x^2+4/x, if any exists.
My work: Derivative- First I multiply
2 answers
668 views
The weight of an astronaut plus his space suit on the Moon is only 270 N.
A. How much do they weigh on Earth, in Newtons,
2 answers
895 views
please help me im confused.
Every item in the Just a Dollar store is priced at $1.00. When Mary Jo opens the store, there is
1 answer
472 views
Every item in the Just a Dollar store is priced at $1.00. When Mary Jo opens the store, there is $122.00 in the cash register.
1 answer
502 views
Compare and contrast indirect versus direct values of biodiversity, and provide examples.
3 answers
1,792 views
Jeanna wants to buy a new boat for her family. She has two payment options. The first option is to pay a cash payment of $7,200.
2 answers
539 views
Use compatible to find the following quotient
180.8 divided by 6 182divided by 11 55divided by 10.7 117.8divided by 0.12 0.6
5 answers
1,424 views
A small pumpkin of mass 2.22 kg is dropped from rest from a height of 2.87 m. The pumpkin rebounds from the ground to a height
2 answers
646 views
Compare ad contrast indirect versus direct values of biodiversity and provide two examples?
1 answer
639 views
The reaction of iron and water vapor results in an equilibrium reaction, 3 Fe(s) + 4 H2O(g) ¡ê Fe3O4(s) + 4 H2(g) and an
4 answers
2,201 views
Creating Z_0 boson via symmetric beams a. Z0 boson has a rest mass energy of 91.187 GeV. It is produced in collisions of
1 answer
377 views
Creating Z_0 boson via symmetric beams a. Z0 boson has a rest mass energy of 91.187 GeV. It is produced in collisions of
1 answer
417 views
A hollow 0.358 kg sphere rolls without slipping down an inclined plane that makes an angle of 41.0o with the horizontal
2 answers
504 views
A hollow 0.358 kg sphere rolls without slipping down an inclined plane that makes an angle of 41.0o with the horizontal
2 answers
591 views
A particle undergoes three successive displacement in a plane as follows 4m southwest, 5m east, 6m in a direction 60 degree
3 answers
1,139 views
a roller of diameter 1.5 m has a mass of 450 kg; it is pulled by a handle attached to its centre. Find the minimum force to pull
2 answers
516 views
A moving 4.5 kg block collides with a horizontal spring whose spring constant is 226 N/m (see figure). The block compresses the
1 answer
544 views
A space station shaped like a giant wheel has a radius of 1.00 x 10^2 m and a moment of inertia of 5.00 x 10^8 kgm^2. A crew of
2 answers
575 views
help
the positions of two particles A and B are P1 (3,4) in meters and P2 ( -3, -4 ) meters respectively. Meters the position A
1 answer
421 views
In a coordinate plane, Brittany labeled the coordinates for point m as (-31/2,2). Sade tells Brittany to reflect point m over
1 answer
443 views
help
A thermally insulated vessel containing 100 grams of ice at 0 degrees Celsius . Water at 55 degrees celsius is poured and
4 answers
1,683 views
A person is stranded and sitting 45m above the ground on the ledge of the cliff. of a safety rope is launched upward at an angle
2 answers
589 views
Which alga is most closely related to plants?
A) Chara B) Kelp C) Ulva D) Diatom E) Euglena I think it's chara, because it is
2 answers
564 views
You have a brass ring of inside diameter 10.00 cm that is at 20.0oC. You want to slip this ring over an aluminum rod that is at
1 answer
1,058 views
What is the Van't Hoff Factor of
MgSO4*7H2O? We're doing a colligative properties lab at my school where we dissolve various
3 answers
1,860 views
What percent (by mass) of granulated sugar is fructose, and what percent of it is sucrose?
Background: We are doing a colligative
2 answers
792 views
L'hopital's question below:
lim x -> 0 from the positive direction of ( 5^(sin(x)) - 1 )/ (x)
1 answer
374 views
I am trying to solve the following L'hopital's limits question below:
lim x -> 0 from the positive direction of ( 5^(sin(x)) - 1
2 answers
533 views
So this one is confusing me:
limit of n as it approaches infinity of (n{SIGMA}i=1) (1/(2^i) *the n is on top of the sigma
5 answers
529 views
This is a calculus homework question but in reality the problem here is understanding the algebra.
Find the Critical Numbers of
4 answers
488 views
A 283 g air track glider moving at 0.69 m/s on a 2.4 m long air track collides elastically with a 467 g glider at rest in the
4 answers
1,368 views
A 283 g air track glider moving at 0.69 m/s on a 2.4 m long air track collides elastically with a 467 g glider at rest in the
2 answers
868 views
Find the value of c which satisfies Rolle’s Theorem for the function f(x)=sin(x²) on (0,√π).
2 answers
530 views
How much energy (in kilojoules) is released when 15.2g of steam at 114.5∘C is condensed to give liquid water at 63.5∘C? The
3 answers
793 views
A car leaves skid marks 72m in length. The deceleration is 7.2m/s^2. What is the speed of the car before braking?
2 answers
598 views
car leaves skid mark 72m in length with a deceleration speed of 7.20m/s^2. what was the initial speed prior to braking?
2 answers
487 views
A car slows down from a speed of 24.0m/s to rest in 9.0s, How far did it travel in that time?
2 answers
687 views
In an experiment to determine the speed of sound, two observers, A and B, were stationed 5.0 km apart. Each was equipped with a
4 answers
1,697 views
A fuel dealer makes a profit of shillings 520 for every 1000 liters of petrol sold and shillings 480 for every 1000 liters of
3 answers
514 views
A perpendicular to the line -4x +3 = 0 point (8, 5). Determine its equation
x = 4/3 undefined y = 5
1 answer
369 views
In the geometric progression, the first is a and the common ratio is r. The sun of the first two terms is 12 and the third term
2 answers
620 views
Find the ordinary interest to the nearest cent.
$19,000 at 12% for 101 days
3 answers
960 views
The ratio of Juma’s and Akinyi's earnings was 5:3. Juma’s earnings rose to shilling 8400 after an increase of 12%. Calculate
4 answers
792 views
The list price of a set of fine china is $345.70 and the trade discount is 55%. Find the net cost.
I did $345.70 *.55= 190.14
5 answers
735 views
A watch with a list price of $889.00 is sold by a wholesaler at a net cost of $545.75. Find the single trade discount rate being
5 answers
638 views
first string sports can purchase sneakers for $450 per dozen less trade discounts of 14/12 from ideal shoes. Fancy footwear is
1 answer
468 views
A 100 kg crate rest at the back of the bed of a pick up truck. The length of the crate is 1 m in the length of the bed is 4 m.
2 answers
834 views
Consider an air-bubble level that is sitting on a horizontal surface. Initially, the air bubble is in the middle of the
2 answers
942 views
10 l of a solution containing 1.5 moles of HI
1 answer
335 views
Waterways is thinking of mass-producing one of its special-order sprinklers. To do so would increase variable costs for all
1 answer
736 views
Waterways is thinking of mass-producing one of its special-order sprinklers. To do so would increase variable costs for all
1 answer
830 views
You run 21 miles in 6 days. find the rate.
1 answer
398 views
A copper atom has 29 electrons revolving around the nucleus. A copper ball has 4x10^23 atoms. What fraction of the electrons be
3 answers
2,564 views
A centrifuge for separation of sugar crystals in molasses must exert a force of 6 N/g. If the filter drum has a radius of 350
1 answer
368 views
I am helping my child and didn't read much of the book Dragonwings, so can you help me to answer what is moon shadows point of
4 answers
543 views
I don't know where to even begin...
Two equally charged ping pong balls, each having a mass of 5g repel eachother hanging from
1 answer
492 views
Hydrogen gas (7.0 mL) is mixed with chlorine gas(4.0 mL) at a certain pressure and temperature. A
reaction between H2and Cl2 is
4 answers
564 views
Sulfur dioxide and oxygen gases react at high
temperature (400 o C) in the presence of a catalyst(like Pt) to form sulfur
2 answers
789 views
Which of the following sentences contains a prepositional phrase that acts as an adjective?
5 answers
1,193 views
On December 1, Year1, El Primero Company purchases inventory from a foreign supplier for 40,000 coronas. Payment will be made in
1 answer
1,041 views
An automobile and a truck start from rest at the same instant, with the automobile initially at some distance behind the truck.
3 answers
1,606 views
A 50kg sign for a local business is hung from a bar which meets a wall at right angles as shown in figure 1. The bar is 1.5
2 answers
651 views
Bonnie and Bruce have a rectangular swimming pool that is 6 feet wide and 10 feet long. They are going to build a tile border of
2 answers
690 views
The Effel Tower in Paris is 328 feet wide at the bottom and 984 feet tall a model of the tower is 12 inches tall What is the
2 answers
802 views
the approximate distance, S, in feet that an object falls in t seconds when dropped from a height can be found by using the
3 answers
1,496 views
A boy throws a ball with a horizontal speed of 2.5 m/s at a height of 0.8 m above the ground. The Coefficient Of Restitution
1 answer
352 views
Five-eights of the population of a village are men, one-sixth are children and the rest, 500 in number are women. How many
3 answers
650 views
A bullet of mass 0.05kg has a speed of 400cm|s. What is its kinectic energy? It hits a wall of which the average resistive force
2 answers
704 views
simplify the expression
(4 square root of x)/(6-square root of x) I need help with this. I've worked it out to the point where i
2 answers
646 views
simplify the expression
(4 square root of x)/(6-square root of x) I need help with this. I've worked it out to the point where i
2 answers
711 views
what is the maximum speed a car could be traveling in order to stop within 40ft?
d=0.05V^2+1.20V
1 answer
404 views
The sum of the angles of a quadrilateral is 360°. Find the conditional, draw a diagram, and state the given and conclusion.
COND
3 answers
1,325 views
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