Questions Asked on
April 29, 2017

physics help
You drive down the road at 39 m/s (88 mi/h) in a car whose tires have a radius of 34 cm. What is the period of rotation of the tires?2sf value/units Through what angle does a tire rotate in one second?2sf value/ units
asked by anonymous 
Math
On centimeter dot grid draw all possible rectangles with a perimeter of 16 cm and sides whose lengths are whole centimeters
asked by Nooreen 
Math
A number cube is rolled 360 times, and the results are recorded as follows: 61 ones, 26 twos, 36 threes, 76 fours, 73 fives, and 88 sixes. What is the experimental probability of rolling a 2 or a 3? A. 0.07 B. 0.17 C. 0.26 D. 0.83
asked by \_(^_^)_/ 
Geometry
Given: ABCD is a trapezoid, AB = CD, BK âŠ¥ AD (they are perpendicular , AK = 10, KD = 20 Find: BC AD I got that BC is 15 and AD is 35 so I got BC/AD=15/35 is this answer right? and is so can you add the answer and an explanation
asked by Allie 
geography
Explain the effects of the poor service delivery. There must evidence that i actually investigate the poor service delivery physically where possible. Explanation must be with regard to social or Economic or Environmental problem
asked by Angel 
Math
Point Q belongs to side AB of square ABCD. The distances from point Q to the diagonals of the square are 2 ft and 3 ft. Find the diagonal of the square.
asked by Allie 
physics help
Some dragonflies splash down onto the surface of a lake to clean themselves. After this dunking, the dragonflies gain altitude, and then spin rapidly at about 1100 rpm to spray the water off their bodies. When the dragonflies do this "spindry," they tuck
asked by anonymous 
math
the area of a regular hexagon is given as 384√3 a. how long is each side of a hexagon b. find the radius of a hexagon c. find the apothem of a hexagon
asked by darik 
Science please help
12. Measure the temperature of two unknown samples with your thermometer 13. Record both temperatures using the scale on the straw. please help ive been stuck for about 1 hour and a half
asked by banna 
Maths, physics, chemistry,
The weight of H2C2O4.2H2O required to prepare 500 ml of 0.2N solution is a)126g b)12.6g c)63g d)6.3g
asked by Deepak 
math
A certain disease has an incidence rate of 0.8%. If the false negative rate is 7% and the false positive rate is 3%, compute the probability that a person who tests positive actually has the disease. Show all work.
asked by un 
Language connections academy
Has anyone read walk two moons by Sharon Creech?
asked by Katie Brown 
science
Of the following, which is NOT an adaptation made by reptiles to life on land? thick, dry, waterproof skin exchange oxygen and carbon dioxide in lungs only eggs with leathery shells open circulatory system I think its either C or B
asked by SwimmerGirl 
Social Studies
which of the following is the best description of a reason the Soviet Union collapsed ? A) Development of the Strategic Defense Initiative * B) The stars wars defense system was successful C) Gorbachev allowed political parties other than his own D) A
asked by Help Ms Sue 
Chemistry
A possible set of quantum numbers for the last electron added to complete an atom of potassium in its ground state is a) n=4, l=0, ml=0, ms= 1/2 b) n=3, l=1, ml=0, ms= 1/2 c) n=4, l=1, ml=0, ms= +1/2 d) n=3, l=1, ml=1, ms= +1/2 e) n=4, l=2, ml=1, ms=
asked by Anon 
Calculus
find the volume of the solid formed by revolving the region bounded by the graphs of y=x^3 y=1 x=2 about the yaxis
asked by Ke$ha 
math
sin130.tan60 ÷cos540.tan230.sin400
asked by reduction formula trigonometry 
Grade 12 Advanced Functions
The length of a child's squarebased jewelry box is 5cm more than its height. The box has a capacity of 500cm^3. Solve a polynomial equation to determine the dimensions of the box.
asked by Zara 
geometry
The side of one square is equal to 1m, and its diagonal is equal to the side of a second square. Find the diagonal of the second square.
asked by Anonymous 
math
Determine the quadrant in which the terminal side of the given angle lies. 230°
asked by J.B. 
Calc
Find a Cartesian equation for the curve and identify it. r=5cscx
asked by Anonymous 
Math
This 3 demensional shape has 7 faces that are rectangles as well as two bases that are polygons. What is this shape ?
asked by Bob 
Pre
How many different license plate number can be made using 2 letters followed by 4 digits selected from the digits 09 a) if letters and digits may be repeated? b) if letters may be repeated, but digits may not be repeated? c) if neither letters nor digits
asked by Kelley 
science
The greatest and least resultant of two forces acting at a point is 29 kgwt and 5 kgwt respectively.If each force is increased by 3 kgwt.Find the resultant of the two new forces when acting at right angles to each other?
asked by Ankit 
Math fp1
The roots of the quadratic equation z^2+(4+i+qi)z+20=0 are w and w* I) in the case where q is real, explain why q must be 1
asked by Stephan 
Maths
A circular pond of radius 4m has a path of width round it. Find the area of the path
asked by value 
Calculus
Find the distance traveled by a particle with position (x, y) as t varies in the given time interval. x = cos^2 t, y = cos t, 0 ≤ t ≤ 9π and the length of the curve so far i got ∫0 to 9pi √((2cos(t)sin(t))^2+(sint)^2) I am having trouble
asked by rob 
math
The perimeter of the base of the regular quadrilateral pyramid is P = 30 cm. Find the sum of all edges of this pyramid, if the perimeter of a lateral face is 27.5 cm
asked by guy 
Physics
a ballon carrying a ball is moving vertically upward with velocity 12 m/sec. when the ballon is at height 65m the ball is dropped,with what speed ball hit the ground?
asked by Piyush 
Math
An aeroplane starts from P and flies due west on the same latitude covering a distance of 1232KM to point T. Calculate the difference in angles between P and T
asked by Yas 
math
Circle the prime numbers in the following set of numbers. Show your work. 953, 1,427, 2,971 I can tell whether each number is prime but I am having a hard time with individual numbers
asked by Matthew 
math
Find the speed of a point on the rim of a 24cm diameter fly wheel which is turning at 2800 revolutions per minute. Give your answer in meters per second.
asked by Sporsho 
physic
A small fly wheel fitted to a motor with a moment of inertia of 80 kg m² slows down from 9000 rpm to 5500 rpm in 7.5 seconds. For the fly wheel, calculate: • The rate of deceleration which you can assume to be constant • The braking torque.
asked by john 
math
The perimeter of the base of the regular quadrilateral pyramid is P = 30 cm. Find the sum of all edges of this pyramid, if the perimeter of a lateral face is 27.5 cm
asked by Anonymous 
Math
Ten students took a math exam. As the teacher evaluated the math exams, she noticed that 8 of the ten students scored above the median. Is this possible? Why I am leaning towards yes it is possible. Kinda confused
asked by Miles 
Chemistry
What is the molarity of a solution containing 1.23g of LiOH in enough water to give a final volume of 380ml? I know the MW of Li is 6.941, O is 15.9594 and H is 1.00794. Using this info the number of mols in 1.23g of LiOH is 0.05144
asked by Raelene 
Chemistry
Calculate the ph of a solution that is 0.2M In NH3 and 0.3M in NH4Cl we find that the acid dissociation constant ka for NH3 is 5.7×10^10
asked by Lana 
math
If there are 10 red marbles and 30 blue, what is the probability of randomly selecting a blue marble?
asked by iggy 
Math
there are 680 coins divided into 3 piles. The second pile has three times as many coins as the first. The third pile has 50 more coins than the second pile. Solve This problem using a tape diagram.
asked by Melissa 
Math
This 3dimensional shape has 6 faces that are triangles as well as one base that is a polygon. What is this shape?
asked by Melissa 
Math  combinatorics/ permutations
There are nine differentlytitled books on a shelf. Four books have red covers, while the other five have black covers. How many different arrangements of the books can there be, if (a) there are no restrictions on the order in which the books are placed?
asked by Rob 
L.A.
Which sentence is punctuated correctly? A. One of only two in existence today, this manuscript rarely leaves the museum's vault. B. One of only two in existence today this manuscript rarely leaves, the museum's vault. C. One, of only two in existence
asked by ? 
Chemistry
Three bottles lost their labels. One contained an aqueous solution of HCl, another an aqueous solution of HNO3, and the third contained an aqueous solution of H2SO4. Write an experimental procedure that would allow you to correctly identify the contents of
asked by Anonymous 
Math
Hello, What are the different formulas for circles (radius, circumfrence, diameter, area)? Thank you
asked by Alexa 
thermodynamic
If the energy used to heat up a block of 2kg of copper is 115.8 kJ, what is the temperature it was heated to if the starting temperature was 100oC and the specific heat capacity is 386 J/kgK. please help. thanks
asked by jaz 
Advanced Functions grade 12
f(x)= a(x+4)(x+1)(x2) Find a
asked by Zara 
Chemistry
Do all salts conduct electricity in water? Why or why not?
asked by Michael1 
Math
Megan read an average (mean) of 2 books a day for 4 days. How many books will Megan need to read on days five and six so that she can say that she read an average of 3 books a day over 6 days?
asked by tammy 
Math
Ten students took a math exam. As the teacher evaluated the math exams, she noticed that 8 of the ten students scored above the mean. Is this possible?
asked by Miles 
social studies
5 causes of contemporary problems
asked by somto 
Statistics
Can 2 X 2 betweensubject ANOVA be used if participants were from the same class and all completed the same survey? For example, say the two conditions were athletic status(athlete vs nonathlete) and parent status (parent or not a parent) and all
asked by 2way ANOVA 
Calculus
Determine the remainder for Sn where n=5 or n=9 for the following series. ∑n=1 to ∞ (n^2+1)/(n^4) S5= R5= S9= R9=
asked by Janna 
electrical
how to calculate the size of cable for 40kw motor
asked by uluubi 
Advanced Functions
Solve the polynomial inequality algebraically. x^22x8 ≤ 0
asked by Zara 
Chemistry
Three bottles lost their labels. One contained an aqueous solution of HCl, another an aqueous solution of HNO3, and the third contained an aqueous solution of H2SO4. Write an experimental procedure that would allow you to correctly identify the contents of
asked by Anonymous 
business
Why do states require centers to be licensed?
asked by Anonymous 
Maths
A single ordered data set includes the following data. 2, 4, 5, 6, 8, 10, x. What is the largest possible value of x if it is not an outlier?
asked by todd 
chemistry
How do you know if a compound is predicted to be polar or nonpolar? Especially if they use imaginary elements as examples?
asked by I need some help please 
Math
How you can quickly calculate the mean of the following test scores without adding the numbers. 76,73,78,75
asked by Tammy 
English
I wrote two thesis statements, which one is good. Which one should I use for my essay. 1) Over the recent years, the use of illicit drugs has increased to some extent with the rise of drug legalization campaigns, though, with reformation and implantation
asked by Daniel 
uni of huddersfield
An electron (m = 9 x 1031 kg) leaves the cathode of a radio tube with zero initial velocity and travels in a straight line to the anode, which is 1 cm away. It reaches the anode with a velocity of 6 x 106 m s1 i)calculate the acceleration and the force ?
asked by Rohit