Branches of Math
Recent Math Questions
kamala had 5026 grams of flour in a canister. she bought a 4157 gram bag of flour. she poured some flour from the bag to the canister. as a result, the mass of the flour in the canister is now twice the mass of the flour left in the bag. how much flour is in the bag now?
Friday, October 31, 2014 at 9:04am
How do i find the length of a projection of a vector A=3x+y+2z on the xy plane? and how do i find the unit vector in the xy plane that is perpendiculer to vector A?
Friday, October 31, 2014 at 8:25am
Randolph runs a home appliance repair business and charges a service call fee of $85 plus $15 per half hour for his labour. Write an equation for calculating the total charges, C, in terms of hours of labour, H. Plot the graph of C vs. H and define the slope and C-intercept of...
Friday, October 31, 2014 at 7:42am
Math Please Check
Please tell me if this are right. Thank you! Find the exact location of all the relative and absolute extrema? h(t) = t^3 - 3t^2 domain: [-1, + infinity) For this one I got x=2 as the minimum, and x=0 as the maximum. g(t) = 3t^4 - 16t^3 + 24t^2 +1 domain: (-infinity, +infinity...
Thursday, October 30, 2014 at 11:00pm
Karen collects 6/7 quart of rainwater. She uses ½ of the water to clean her bicycle and uses the remaining water equally for 3 houseplants. What volume of water does she use for each houseplant?
Thursday, October 30, 2014 at 9:42pm
kaya is making dream catchers. each dream catchers uses 6 feathers. she makes 4 dream catchers with black feather 3 with brown 1 with white and 2 with gray. what fraction of the dream catcher have either black or brown feather
Thursday, October 30, 2014 at 6:54pm
there are boxes of tangerines each box has 93 tangerines the Tangerines will be divided equally among 9 classrooms how many tangerines will each classroom get
Thursday, October 30, 2014 at 5:58pm
if a flagpole is 20ft tall and casts a shadow of 27ft how tall is a building that casts a shadow of 185ft? write a proportion and solve. round your answer to the nearest foot.
Thursday, October 30, 2014 at 5:52pm
7th grade math
Can you check my answers? 1. 48lbs 6oz - 19lbs 9oz = 47lbs 22oz - 19lbs 9oz Ans: 38lbs 13oz 2. 3weeks 5days x 8 = 24weeks 40days; 40days=8weeks Ans: 32weeks 3. 49 people are in line to see a movie. 17 are in front of Jackie. How many are behind her? 49 - 18 = 31 Ans: 31 people...
Thursday, October 30, 2014 at 5:48pm
Write the slope intercept form fo an equation of the line that passes through the given point and has the given slope 1. Point (1,1) Slope 1/4 Formula y-y1=m(x-x1) Answer : y=1/4x+0
Thursday, October 30, 2014 at 5:46pm
equation is J=0.15h J=total cost, h=hats How much would it cost to buy 10 hats? calculate the total cost and show how you got the answer. would it be J=0.15*10 ? thank you
Thursday, October 30, 2014 at 5:45pm
A flat-bottom river barge is 30.0 ft wide, 85.0 ft long, and 15.0 ft deep. (a) How many ft3 of water will it displace while the top stays 3.00 ft above the water? (b) What load in tons will the barge contain under these conditions if the empty barge weighs 160 tons in dry dock?
Thursday, October 30, 2014 at 5:42pm
Arrange the following real numbers in order from greatest to least: 0.8, 0.8(repeating 8), 0.89(repeating 89), 0.889( repeating the second 8 and 9), and 0.88. I think I got it, but just want to make sure.
Thursday, October 30, 2014 at 5:35pm
two types of sandwiches were made for a tea party. 55% of the sandwiches were cheese sandwiches and the rest were chicken. If there were 252 chicken sandwiches, how many sandwiches were made altogether?
Thursday, October 30, 2014 at 4:40pm
there are 6 purple socks and 4 orange socks in a drawer. zucky picked one sock without looking and then another without looking or replacing the first. what is the probability that he picked 2 purple socks?
Thursday, October 30, 2014 at 4:11pm
The potential at the surface of a sphere (radius R) is given by V_0 = k cos 3theta where k is constant. Find the potential inside and outside the sphere as well as the surface charge density (lower case sigma(theta)) on the sphere. (assume there is no charge inside or outside ...
Thursday, October 30, 2014 at 3:14pm
My question is this: The potential at the surface of a sphere (radius R) is given by V_0 = k cos 3theta where k is constant. Find the potential inside and outside the sphere as well as the surface charge density (lower case sigma(theta)) on the sphere. (assume there is no ...
Thursday, October 30, 2014 at 2:45pm
For which set of data is the median 15? 89, 75, 90, 15, 74, 88, 89 23, 35, 77, 81, 64, 15, 44 14, 15, 15, 15, 18, 18, 19, 19, 20 8, 20, 17, 21, 14, 15, 9
Thursday, October 30, 2014 at 12:20pm
identify the underlined place in 63.264. Then round the number to that place. thousandths; 63.26 hundredths; 63.26 hundredths; 63.27 thousandths; 63.27 2. The average annual rainfall in Miami, Florida is 61.93 inches. The average annual rainfall in Indianapolis, Indiana is 42....
Thursday, October 30, 2014 at 12:09pm
7. What is the best measure of central tendency for the data? What answer do you get using this measure? red blue green brown red pink orange mode; red median; green mean; red mode; pink
Thursday, October 30, 2014 at 11:44am
Point E is located at (-2,2) and point F is located at (4,-6). What is the distance between points E and F? A. square root 52 B. square root 28 C. 10 D. square root 20 Is the answer A? Thank you
Thursday, October 30, 2014 at 10:37am
A marine biologist is testing a new under water probe. The probe is catapulted from the ship into the air, descends under water to a predetermined depth, and then returns to the surface where it can be collected. The function that models the probes path is f(x) = 15t2...
Thursday, October 30, 2014 at 10:00am
Which of the triangles described in the table is a right triangle. Table Triangle Q, Side 1=25 Side 2=10 Side 3=15. Triangle R, Side 1=26 Side 2=20 Side 3=46. Triangle S, Side 1=25 Side 2=20 Side 3=1,025. Triangle T, Side 1=25 Side 2=26 Side 3=650. A. Q B. R C. S D. T Is the ...
Thursday, October 30, 2014 at 9:43am
The length of the hypotenuse of a right triangle is 13 m. The length of one leg is 5 m. Find the length of the other leg. A. 14 cm B. 144 cm C. 8 cm D. 12 cm Is the answer C? Thank you
Thursday, October 30, 2014 at 9:29am
Katrina is studying the effect of foreign substances on bacteria populations. If she introduces a beneficial substance, such as food, the bacteria population grows. If she introduces a harmful substance, such as a poison, the bacteria population decreases. The function f(x) = ...
Thursday, October 30, 2014 at 8:50am
Nathan is designing a box to keep his pet newt in. To make the box, hes going to start with a solid rectangle and cut squares with sides x cm in length from each corner, as shown in the picture below. The dimensions of the of the solid rectangle are 51 cm by 45 cm. The ...
Thursday, October 30, 2014 at 12:35am
150 men live in a certain town: 85 are married 70 have a cell phone 75 own a car 55 are married and have a cell phone 35 have a cellphone and a car 40 are married and have car 30 are married, have a car and have a cellphone. How many men are single and do not have a car? How ...
Thursday, October 30, 2014 at 12:32am
Please help I'm so confused!!!! 1. Which two square roots are used to estimate the square root of 5? a. square root of 1 and 2 b. square root of 2 and 4 c. square root 4 and 9 d. square root of 9 and 16 2.Which two square roots are used to estimate square root of 43? a. ...
Wednesday, October 29, 2014 at 10:44pm
A biker traveling with a velocity of 80 feet per second leaves a 100 foot platform and is projected directly upward. The function modeling the projectile motion of the biker is s(t)=-16t^2+80t+100,where s(t) is the height and t is the number of seconds the biker is in the air...
Wednesday, October 29, 2014 at 8:42pm
of the students in ms Martinez class 11/24 walk to school. another 3/8 of the students ride their bikes to school. what fraction more of students walk than ride their bikes to school.
Wednesday, October 29, 2014 at 8:29pm
currency exchange/ math
Timothy sold US$130 to a bank when the exchange rate was C$1 = US$0.9315. The bank charged him a commission of 0.55%. How many Canadian dollars did he receive from the bank for US$130?
Wednesday, October 29, 2014 at 7:55pm
Anna is twice as old as Julian.five years ago,eye was three times as old .let x be julian`s present age write an equation for x and find the present ages of Anna and julian
Wednesday, October 29, 2014 at 7:54pm
George cycles to go half the distance at 4m/s but slows to 3m/s for the second half of his trip.he takes 35minutes to complete the trip.find the distance he travels
Wednesday, October 29, 2014 at 7:41pm
Chris is determining the amount of raisins he will use for a raisin bread recipe. The ratio of cups of raisins: number of loaves Chris used is 3 raisins to 2 loaves. Which ratio is equivalent to the rate of raisins to loaves of bread that Chris can use?
Wednesday, October 29, 2014 at 6:29pm
math- bc calc
a building is 36 ft tall. A pulley is attached to the top of the building. A rope is looped through the pulley. One end of the rope is attached to the lantern that hangs vertically parallel to the side of the building. The rope passes up vertically from the lantern, through ...
Wednesday, October 29, 2014 at 3:10pm
Each digit in the division example has been replaced with the same letter throughout. (r stands for remainder.) The digits used wher 1,2,3,4,5,7,and 9. Find the numbers SU rE ------ )CAN -CU ------- IN - IU ------- E
Wednesday, October 29, 2014 at 2:25pm
Dominick is in charge of ordering supplies for harry's hamburger stand. hamburger buns come in packs of 12 and frozen hamburger patties come in packages of 20. he must have the same amount of rolls as patties. What is the least number of packages of each that he must order.
Wednesday, October 29, 2014 at 2:10pm
A projectile is shot vertically into the air. Its height, h, in metres, after t seconds is approximately modelled by the relation h=-5t^2+120t+125: c) For how many seconds is the projectile in the air? (1 mark)
Wednesday, October 29, 2014 at 1:11pm
The formula l=8t^2/pi^2 represents the swing of a pendulum. In this formula, l is the length of the pendulum, in feet, and t is the time, in seconds, it takes to swing back and forth once. Whst is the length of a pendulum that makes one swing in 2s? Please help!! Thank you for...
Wednesday, October 29, 2014 at 12:26pm
MATH FOR THE OFFICE
THE BEGINNING OF THE WEEK A STOCK SOLD 29 3/8 PER SHARE AT THE END OF THE SAME WEEK IT SOLD FOR 31 2/8 WHAT WAS THE AMOUNT OF INCREASE PER SHARE?
Wednesday, October 29, 2014 at 11:09am
from a boat, the angle of elevation of the foot of a lighthouse on the edge of a cliff is 34 degrees. if the cliff is 150m high, how far from the base of the cliff is the boat
Wednesday, October 29, 2014 at 5:13am
Find the water pressure at ground level to supply water to the third floor of a building 8.00 m high with a pressure of 325 kPa at the third level So the given is h=8.00 Ptop=325kPa Density water = 1000 Would I need to set it up like 325+1000*9.81*8.00
Tuesday, October 28, 2014 at 11:09pm
Math Demand Functions
Given the function q=D(x)=k/x^n where k is a positive constant and n is an integer greater than 0. How would you find the elasticity of the demand function After you find the der. what do you do?
Tuesday, October 28, 2014 at 10:57pm
Is the following statement always, sometimes, or never true for numbers greater than zero: "In equivalent ratios, if the numerator of the first ratio is greater than the denominator of the first ratio, then the numerator of the second ratio is greater than the denominator...
Tuesday, October 28, 2014 at 10:14pm
Please help..not wanting answer just where to start... A cylinder has a radius of 5 centimeters and a height of 12 centimeters. What would the height of a cone need to be if it is the same volume and radius?
Tuesday, October 28, 2014 at 9:01pm