Posts by Jonathan
Total # Posts: 460

Using Geometry in Probability
Allen and Bethany each arrive at a party at a random time between 1:00 and 2:00. Each stays for 15 minutes, then leaves. What is the probability that Allen and Bethany see each other at the party? 
physics
A force F applied to an object of mass m causes it to move in a straight line a distance D during an interval of time T. The object gains kinetic energy K during this interval. In which of the following cases will the object gain the same kinetic energy K? A) A force F is ... 
Chemistry
Look to the structure of the alcohol. Alcohol types are determined based on how many carbons are attacked to the carbon bearing the hydroxile. Primary will have no other carbons, secondary will have one, tertiary will have two. 
Calculus
Find d/dt integral[2 to x^2](e^x^3)dx 
Health
Sorry your right bacterial and viral infections are caused by microbes and spread by coughing and sneezing. Thank you I now know my answer. 
Health
Thank you and now that I did some research could c also count? 
Health
How might a forest fire affect the health of people in nearby communities? (Select all that apply.) a. increased risks of asthma attacks b. increased risks of viral infections c. increased risks of bacterial infections d. increased risks of heart problems i think its a, b, and d 
Health
Thank You :) 
Health
Why are routine screenings for cervical cancer important? (Select all that apply.) a. Cervical cancer screenings guarantee a longer life. b. Cervical cancer screenings can identify precancerous cells. c. They can identify cancer cells before symptoms occur. d. They can help ... 
Statistics
What is a diagram that shows the frequency of data on a number line. I honestly don't know. 
math
Thank you!! 
math
Find the area of the figure. Round to the nearest tenth if necessary. L(3,6), M(7,3), N(6,1), J(2,1), K(3,3) 
math
I just went back and checked... I should have written quadrilateral...thank you! 
math
Find the area of the rhombus. Round to the nearest tenth if necessary. M(0,4), N(3,0), P(0,3), Q(3,0) 
math
Given the coordinates of the vertices of a quadrilateral, determine whether it is a square, a rectangle or a parallelogram. Then find the area of the quadrilateral. E(–7, –1), F(2, –1), G(–4, –8), H(5, –8) 
Math
Solve the equation. 100^(5x+2)=1000^(4x1) 
Math
In a class of 20 students, 40% are boys. Twentyfive percent of the boys and 50% of the girls wear glasses. How many students wear glasses? 
Geometry
10. Which of the following quadrilaterals always have diagonals that are congruent. Circle all that apply Parallelograms Rectangles Rhombi Squares Isosceles trapezoids 19. Given square ABCD: if the measure of angle ACB = (1x  32) degrees, find the value of x. Round to the ... 
Geometry
10. Which of the following quadrilaterals always have diagonals that are congruent. Circle all that apply Parallelograms Rectangles Rhombi Squares Isosceles trapezoids 19. Given square ABCD: if the measure of angle ACB = (1x  32) degrees, find the value of x. Round to the ... 
PAVCS
How many moles of gas are in a 20 liter scuba canister is 300k and pressure is 200 atm 
Science
I agree I took the test and it was very difficult for me to do but cheating is not the way because one day you will get in trouble for it. 
Social Studies
Thank you Reed your amazing 
Social Studies
Answer: B I dont see a text 
Social Studies
Reed I put answer B 
Social Studies
Can anyone please help me with this question its on my test and I need help I've tried several times and cannot get the answer. Its from connexus. 
Social Studies
1. In the AD 600s, North africa was conquered by A. Egyptians B. Arab Muslims C. Europeans D. Africans from south of the Sahara 
History
Sorry meant c 
History
Is it A 
Physics
a golf ball is shot from a tee which is located 18.0m above the green. The initial velocity of the golf ball is 42.0 m/s at an angle of 50.0 degrees above the horizontal. The ball behaves as an ideal projectile during its flight from the tee to the green(i.e. no air resistance... 
Maths
A woman is seven times as old as her son. In five years time, she will be five times as old as him. How old are they now? 
Chemistry
C (s) + S2 (g) = CS2 (g) . Kp=5.6 At equilibrium, P cs2 = 0.152 atm. Find P s2 How would I start this problem? 
Chemistry
The information provided in the bracket above. 
Chemistry
Calculate the tota bond energy of ethanol from this info:(C_C=347,C_H=414,H_O=464,C_O=360)kJmol1.Thanks for responding 
biochemistry
Yeah.(H+) (OH)=1x10"14.(H+)(0.2)=10"14.H+=10'14/2x10"1=0.5x10"14(1)=0.5x10"13 or 5.0x10"14. 
Chemistry
M=1.1kg,C=0.385,change in temp=5027.5=22.5C.Q=1.1x0.385x22.5=?KJ 
english
2 and 3 is not wrong 
science
I don't understand your question. 
Science
Molecular mass= density X 2 = 1.56X2=? 
Physics
Q=MxCxchange in temp=0.8x4.2x100=336KJ. 
Chemistry
For water to to boil,ice to melt and for temperature to increase from 35C to 45C,it means heat is absorbed(endothermic). 
Chemistry
b.The liquid water freezes because heat is given off from it(exothermic) to form ice unlike other options. 
Chemistry
5Cm3 Of SO3 will be formed by 2.5Cm3 O2. 
Chemistry
Of O2 
Chemistry
2SO2+O2=>2SO3 From the equ,1Cm3 of O2 formed 2Cm3 of 2SO3.Therefore, 5Cm3 will be formed by 5 X 1/2=2.5Cm3 of SO3. 
Biology
i'm not talking about location but functions and actions. 
Biology
Why? 
Biology
Is medulla oblongata responsible for peristalsis? 
Physics
Thanks. 
Physics
Two perpendicular forces have a resultant of 13N.if one of the forces is 5N, the other force is? 
Biology
yeah. 
Biology
Thanks a bunch! 
Biology
Phylum in the animal kingdom rather. 
Biology
What's the largest and most successful kingdom in the animal kingdom? 
Chemistry
What's the resulting solution if 2000cm3 of 1MH2S04 is mixed with 20cm3 of 1M NaOH? i got 0.5M,acidic in concentration. 
Science
I mean what is can the name of this enhancer be? 
Science
When a silvery powdery substance was added to boiling beans,the beans get cooked quicker than normal. what may this be? 
Chemistry
The relationship between velocity(U) of a gas molecules and their relative molecular mass(RAM) is? 
Chemistry
28.11 i got this but 29 is the answer in my text. 
Chemistry
what is the relative atomic mass of a silicon containing ore with 92% 28'Si,5%29'Si and 3%30'Si? 
math
7.55 rather 
math
75.55. 
Chem
Actual mass=47.62346.719=0.904g. mass of CaCo3(Ca=40,C=12,O=16X3=48.40+12+48)=100g %=100/1.631X100 
social studies
ways in which individuals can apply the concept of independence and selfreliance in their lives. 
math
1/8X 20=2.5.therefore each dose contains 2.5ml 
maths
express log9 in terms of log3 x and log3 y and solve for x and y simultaneously 
Math
A spinner is divided into 8 equal sections. Each section is numbered 18. Find each probability for one spin. 
Chemistry
It's molecular mass is 2.The compound is H2O2. 
value
A Biased Coin Is Such That The Head Is 4 Times More Likely To Show Up Than The Tail.What Is The Probability Of Obtaining A Head? 
Calculus
A particle moves along the xaxis so that at any time t, measured in seconds, its position is given by s(t) = 5cos(t) ? sin(3t), measured in feet. What is the acceleration of the particle at time t = ? seconds? 
Calculus
The position of a particle on the xaxis at time t, t > 0, is s(t) = ln(t) with t measured in seconds and s(t) measured in feet. What is the average velocity of the particle for 1 ? t ? e? a)1 b)e c)e1 d)1/(e1) 
Calculus
The driver of a car traveling at 60 ft/sec suddenly applies the brakes. The position of the car is s(t) = 60t ? 1.5t^2, t seconds after the driver applies the brakes. How many seconds after the driver applies the brakes does the car come to a stop? a)60 sec b)40 sec c)20 sec d... 
Calculus
A particle moves with velocity function v(t) = 2t^2 ? 3t ? 3, with v measured in feet per second and t measured in seconds. Find the acceleration of the particle at time t = 2 seconds. a)3/4 feet per second^2 b)1 feet per second^2 c)32 feet per second^2 d)5 feet per second^2 
Calculus
A particle is moving along the xaxis so that its position at t ? 0 is given by s(t)=(t)In(2t). Find the acceleration of the particle when the velocity is first zero. a)2e^2 b)2e c)e d)None of these Any help is greatly appreciated 
Math
Jean has $280 in her savings account starting next week she will deposit $30 in her account every week is the amount of money in her account proportional to the number of weeks. Thank you for helping 
algebra
I think the answer is 4.5 
English Check
You would say for me. So it should be you and me since its in the objective form! 
English Check
So my original answer is correct You and I 
English Check
But "I" is the subject and you is the object. 
English Check
The advice was meant for ____ A)you and i B)she and i C) you and me Hello i need help. My original answer was A)you and I. But then I started reading a book on English grammar and it says it should be C)she and I since they are subject pronouns. 
10th Grade Math
A history class is comprised of 6 female and 9 male students. If the instructor of the class randomly chooses 5 students from the class for an oral exam, what is the probability that 2 female students and 3 male students will be selected? Round your answer to 3 decimal places... 
pre calc
5x+3yi=56i? 
Math
Thanks you! I got the answer! 
Math
Two trains leave the station at the same time, one heading east and the other west. The eastbound train travels 12 miles per hour slower than the westbound train. If the two trains are 400 miles apart after 2 hours, what is the rate of the eastbound train? No Rounding. 
math
If 35% of people surveyed prefer orange to apples.Out of 475 people surveyed how many can be predicted to prefer orange 
World History
It is ture 
english
It A 
Geometry
Point $G$ is the midpoint of median $\overline{XM}$ of $\triangle XYZ$. Point $H$ is the midpoint of $\overline{XY}$, and point $T$ is the intersection of $\overline{HM}$ and $\overline{YG}$. Find the area of $\triangle MTG$ if $[XYZ] =150$. 
chemistry
what volume of glycerine C3H8O3, with a density of 1.26 g/mL should be taken to obtain 2.50 ml of glycerine? 
Math
Larry hit 24 home runs last season and 50 this season. What is the percent of increase in the number of home runs Larry hit from last season to this season? 
U.S History
Don't You Push Me Down Words and Music by Woody Guthrie Well you can play with me And you can hold my hand. We can skip together Down to the Pretzel man You can wear my mommy's shoes Put on my daddy's hat You can even laugh at me But don't you push me down. ... 
physics
calculate the electrostatic force between charges of 2.4 µC and +5.3 µC, placed 58cm apart in a vaccum. 
physics
An artificial Earth satellite, of mass 3.00 × 10^3 kg, has an elliptical orbit, with a mean altitude of 500 km. (a) What is its mean value of gravitational potential energy while in orbit? (b) What is its mean value of orbital kinetic energy? (c) What is its total energy... 
maths
determine the thrust produced if 1.5 x 10^3 kg of gas exits the combustion chamber each second, with a speed of 4.00 x 10^3 m/s 
maths
4x+16y:32 and 4x+y:17 
physics
A capacitor,consisting of two metal plates each of area 50cm2 and space 0.2mm apart in air ,is connected across a 120V supply.Calculate (1)the energy stored..(2)the electric flux density and the potential gradient.. 
Geometry
A photographer enlarged a picture. If the width of the image is 5 inches and the width of the preimage was x, what is the scale factor for the dilation in terms of x? 
gale math
How to write 233.75 and 85.50 as a decimal number 
math
a)without using a spreadsheet, construct an amortization table for the loan repayment b)what is the final payment if she takes all of the four years to repay the loan c)what is the last payment if she chooses to repay the loan in seven payments 
math
meredith borrows $3600 to help pay for nurse's college. she will repay the loan by making equal blended payment of $625 each at the end of every six months. The interest rate is 11%/a, compounded semi annually. 
Math
If 500 feet of fencing is used to enclose a rectangular plot of land that borders a river, what is the maximum area that can be enclosed? Answer to two decimal places.