Questions Asked on
December 23, 2012

math
A certain antibioyic reducesthe number of bacteria in your body by 10% each dose a) if four doses of the antibiotic are taken, what percent of the original bacterial population is left. b) biologists have determined that when a person has a bacterial
asked by Riana 
Physics
An attack helicopter is equipped with a 20 mm cannon that ﬁres 198 g shells in the forward direction with a muzzle speed of 711 m/s. The fully loaded helicopter has a mass of 4810 kg. A burst of 75.3 shells is ﬁred in a 6.27 s interval. What is the
asked by Anonymous 
maths
Robin says , 'If Jai gives me Rs. 40, he will have half as much as Atul , but if Atul gives me Rs. 20, then the three of us will all have the same amount. ' What is the total amount of money that Robin, Jai and Atul have between them ?? please explain
asked by Anonymous 
physics
In a particular crash test, an automobile of mass 1369 kg collides with a wall and bounces back oﬀ the wall. The x components of the initial and ﬁnal speeds of the automobile are 10 m/s and 1.9 m/s, respectively. If the collision lasts for 0.18 s,
asked by Anonymous 
Math
Weatherwise is a magazine published by the American Meteorological Society. One issue gives a rating system used to classify Nor'easter storms that frequently hit New England and can cause much damage near the ocean. A severe storm has an average peak wave
asked by Alison 
GEOMETRY HELPPPPP MEEEE PLEASSEEEEE!!!
Find the lengths of the diagonals of this trapezoid. trapezoid on a graph with points (a,0), (b,c), (b,c), (a,0) negative a and b are on the left side (a is on bottom and b is on top) and positive a and b are on the right side (a is on bottom and b is on
asked by Anonymous 
physics
A bobcat jumps with a speed of 5m/s at an angle of 55 degrees. How long does the bobcat stay in the air?
asked by Anna 
Math
In the accompanying diagram, abcd is a rectangle with ab as a diameter of semicircle o. Diagonal bd is drawn in rectangle abcd. The length of bd exceeds the length of ab by 1, and ad=5. Please help thank you
asked by Kiki 
math
IN THE FIGURE,^ACP=40 DEGREE AND ^BPD=120 DEGREE.THEN FND ^CBD
asked by HELLLLPP 
science
A boy standing on top a building with a height of 500m throws a ball vertically upwards. The balls take 40s to reach to the ground. Neglecting the height of the boy throwing the ball, determine the velocity of the ball.
asked by Pankaj kumar suman 
maths plse help me..
In a parallelogram ABCD, diagonals AC & BD intersect at O. E, F, G, & H be the midpoints of sides AO, DO, CO & BO. Find the ratio of (EF+GH+HG+EH) TO (AB+BC+CD+AD).
asked by Anonymous 
entrepreneur
Explain the reasons that a small business might fail and explain the factors/characteristics that contribute toward small business success.
asked by Huyen 
chemistry
(c) Calculate the degree of polymerization n of polystyrene with a molecular weight of 3.091×106 g/mol.
asked by danhil 
chemistry
(c) What is the value of the degree of polymerization n of isotactic PB with a molecular weight of 3.091×105 g/mol?
asked by danhil 
maths
There are three mixtures of equal capacity and all are completely filled with acid and water mixtures in diferent ratios. The ratio of acid to water in the first container is 2:3 ,in second 3:7 and third 4:11. If the mixtures of all the containers are
asked by angel 
Math
If 20% of a number is equal to 3x, then the number is. Please help thank you
asked by Kiki 
Astronomy
At opposition, Saturn is observed to subtend an angular radius of 9.16 arcseconds (not including the rings). Use this and the conversion factors in our Table of Constants to find the radius of Saturn in km, rounded to three significant digits.
asked by sam 
Math
The math problem is set up as a fraction in parenthesis 6 over 4. Evaluate the expression (6/4)
asked by Brian 
Math
From a survey of 200 college students, a marketing research company found that 130 students owned iPhones, 70 owned cars, and 60 owned both cars and iPhones. (a) How many students owned either a car or an iPhone (but not both)? _______students (b) How many
asked by Brian 
maths plse help me..
a circle enclose a rectangle of side 6cm and 8cm. what is the perimeter of the circle?
asked by Anonymous 
maths
ABCD ia a parallelogram whose diagonals intersecting at E. AC is produced to F such that CF=AE. Prove that ar(BDF)=ar(parallelogram ABCD)
asked by Anonymous 
survey of sciences
1. Explain what happens to the Gforce as the speed of the centrifuge increases.
asked by shaquilla 
Astronomy
We observe that oppositions of Saturn repeat every 378 days. Use this information to find the sidereal period of Saturn. Express your answer in years and round to two significant digits.
asked by sam 
Astronomy
The volume of a ball is given in terms of its radius by V=4π3R3. Use this to find the average density of Saturn, i.e. the mass per unit volume. Use Earth’s mass in kg from the Table of Constants to express your answer in kgm3. Note for comparison that
asked by sam 
Astronomy
Consider the same asteroid initially in the asteroid belt at a distance 3 AU from the Sun, and 2 AU from Earth, which collides with Earth. As it falls towards Earth, it acquires kinetic energy (neglect its initial motion) both by being accelerated towards
asked by sam 
Music
How are the sounds turned into notes? A) By increasing the amount of air blown into the blow hole B) By decreasing the amount of air blown into the blow hole C) By changing the position of the mouth on the blow hole. D)By pressing the keys My answer is D
asked by Anonymous 
Math 116
five times a number decreased by twice the same number
asked by Gayle 
maths stats
For each day of the 5day working week Tom can choose any one of 6 newspapers to read at the lunchtime. (i) How many different choices are possible in a week? (ii) If Tom wants to read a different title each day, then how many different choices are
asked by tom 
Math
The diameter of an atom is 2.3 x 10^ 8 centimeters. How many atoms can fit in a space .003 centimeters long, without exceeding it? Please help, thank you
asked by Kiki 
statistics
a research wanted to test a new diabetes drug: what level of significance would she use in testing?
asked by eve 
maths
Express sin 2x cos 4x as a sum of trigonometric functions.
asked by laura 
math
The probability of event A is 5/8. The probability of event B is 2/5. Explain why A and B cannot be mutually exclusive events.
asked by Rya 
Astronomy
Saturn’s Moon Janus is observed to orbit the planet with period 0.695 days, grazing the planet with an orbital radius only 2.64 times the radius of the planet itself. Use this information to find the mass of Saturn. Express your answer as a multiple of
asked by sam 
Astronomy
Consider an asteroid of radius 2 km and density 2,500 kgm3 impacting the Earth. When it collides with the surface its kinetic energy is, to a large extent, dumped into the environment, some as heat vaporizing rock and some as mechanical energy throwing
asked by sam 
Astronomy
Suppose the Moon is at a (centertocenter) distance D from Earth. Find an exact expression for the magnitude of the tidal force applied by Earth to our rock of mass m in terms of D, m, the mass of Earth Me (input as M_e), and the lunar radius Rm (input as
asked by sam 
Math
Evaluate the following expression. (Note, I'm not sure how to write this in mathematical form)but the P is slightly raised above both numbers. 210 P 1 = ______
asked by Brian 
Urgent Math
f(x)=(x+2)^34. The point (2, 4) is which of the following? A) An absolute maximum B) An absolute minimum C) A critical point but not an extremum. D) Not a critical point E) None of these I think the answer is C, am I right?
asked by Brian 
English
Hello. I will really appreciate some help. 1)Is it correct to use ing form in the sentence: "The aim of the group is creating a new strategy" or is it "the creation" or only "to create"? 2)Do you think it's OK to use the word "target" instead of "aim" in
asked by Ilma 
Math
Find the standard divisor for the given population and number of representative seats. Assume the population is equal to 190,000 and the number of seats is 8. d = ______
asked by Tina 
Math
Suppose the modified quota is 7.47. Fill in the blanks, and round your answers to two decimal places. (a) Find the lower quota. (b) Find the upper quota. (c) Find the arithmetic mean of the lower and upper quotas. (d) Find the geometric mean of the lower
asked by Derrick 
Calculus
Use the graph of f(x)=x^2/(x^24) to determine on which of the following intervals Rolle's Theorem applies. A) [0, 3] B) [3, 3] C) [3/2, 3/2] D) [2, 2] E) None of these
asked by Brian 
Algebra
Suppose the modified quota is 2.77. Fill in the blanks, and round your answers to two decimal places. (a) Find the lower quota. (b) Find the upper quota. (c) Find the arithmetic mean of the lower and upper quotas. (d) Find the geometric mean of the lower
asked by Casey 
Physics
A(n) 15 g bullet is ﬁred into a(n) 116 g block of wood at rest on a horizontal surface and stays inside. After impact, the block slides 15 m before coming to rest. The acceleration of gravity is 9.8 m/s 2 . If the coeﬃcient of friction between the
asked by Anonymous 
statistics
a. Compute the mean, median, and mode. b. Compute the variance, standard deviation, range, coefficient of variation, and Z scores. Are there any outliers? Explain. c. Are the data skewed? If so, how? d. Based on the results of (a) through (c), what
asked by lou 
Math
Suppose the modified quota is 7.47. Fill in the blanks, and round your answers to two decimal places. (a) Find the lower quota. (b) Find the upper quota. (c) Find the arithmetic mean of the lower and upper quotas. (d) Find the geometric mean of the lower
asked by Derrick 
Math
3sqrt(23) * 7sqrt(10) * sqrt(45)
asked by isabella 
maths plse help me..
if the no. of bacteria doubles everyday and on the 16th day , a jug becomes full . then on which day was it half filled?
asked by Anonymous 
Science
A student weighs 36.4kg suppose his entire body is made of electrons. How many electrons are present in his body. What would be charge in his body.
asked by Raju singh 
Astronomy
Darwin proposed that the Moon formed far closer to Earth than it is now. Let’s see just how close it could possibly be to Earth and survive. In particular, in the next 4 problems you will find the distance from Earth at which the tidal force due to Earth
asked by sam 
math
Suppose an insurance agent offers you a policy that will provide you with a yearly income of $190,000 in 30 years. What is the comparable annual salary today, assuming an inflation rate of 3%?. (Round your answer to the nearest cent.)
asked by Anonymous 
music
What is the diameter of the head joint of the flute?
asked by Anonymous 
Math
Find the probability whose odds against are given in the problem. Odds against are 5 to 7. Answer is ________.
asked by Brian 
Math
Use the definition of logarithm to simplify each expression. (a) log6b (6b) (b) log9b ((9b)^5) (c) log10b ((10b)^8)
asked by Brian 
math
47 lbs=kgs give answer in decimal form
asked by brooke 
Math116
Can someone help me with the answers for my final exam in Math 116?
asked by Gayle 
Comp Hardware
Your neighbor gives you his old computer. The memory modules in it have 184 pins and two notches. What type of memory is this? A. DDR2 B. DDR3 C. SIMM D. Direct RDRAM the ext is pretty ambiguous but I am leaning toward C. SIMM
asked by Chy