# ben

Newest questions posted by ben-
## Calculus

Differentiate the following function. f(t) = 6/7t^6 − 7^t4 + 4t -
## social studies

Which of the following is a likely reason that someone today might decide to move from a city in the Midwest to the South? 1. A. the decline of manufacturing in the Midwest B. the many high tech jobs available in the South----- C. urban overcrowding in the -
## Physics

An object is attached to a hanging unstretched, ideal and massless spring and slowly lowered to its equilibrium position, a distance of 5.3 cm below the starting point. If instead of having been lowered slowly the object was dropped from rest, how far then -
## math

Find the sum of the first 15 terms of the geometric sequence. ∞ Σ 3n − 1 n = 1 -
## math

Find the sum. (Round your answer to two decimal places.) 5 Σ 200(1.09)^n n = 0 -
## math

Find the sum of the infinite geometric series, if possible. 12 + 10 + 25/3 + 125/18 + ... -
## Math

Mark borrowed $200 at 12% compound interest for two years. If he makes no payments. How much interest will he owe at the end of the second year? A $48.00 B $50.88 C $26.88 D $24.00*** -
## Sociology

1. List two or more messages you received from your parents about who you are and what you were about. Discuss how the messages were conveyed. Messages can be delivered directly through what our parents say to us or say to others about us. They can also be -
## Math

A pencil holder shaped like a triangular prism is shown in the picture. The height of the pencil holder is 12 cm, and the volume of the pencil holder is 216 cm3. What is the area of the base? A 144 Square Centimeters B 12 Square Centimeters C 2592 Square -
## Math

I think I have my answer but I still need help Daniellewillusetheinstructionsintheboxbelow to make a cleaning solution. Add 13 cups of water to every 2 cups of concentrated cleaner. Which of the following proportions can be used to ﬁnd w , the number of -
## Calculus

Sarah is filling ice cream cones with shaving cream to hand out to trick or treaters. The cones have a largest radius of 3 centimeters and a depth of 13 centimeters. She fills them at a rate of 5 cubic centimeters per second. (She works carefully so that -
## algebra

Sound travels about 340 m / s. The function d (t) = 340t gives the distance d (t), in meters, that sound travels in t seconds. How far does sound travel 59 s? d(59)=? meters -
## Honors Geometry

The diagonals of a kite are 21 and 24 and the shorter diagonal bisects the longer. If the kite has exactly one right angle, what are the side lengths of the kite? -
## Chemistry

Is the equivalence point always supposed to be equal to 7. I just did a lab and when plotting my data I calculated my equivalence point to be around 8. -
## Physics

A box is pushed by a 750 N force that acts at a 30 degree angle with a friction less surface.The force pushes a box that has a weight of 500N a distance of 15 meters. How much work is done on the box? -
## Econ

Suppose that you are a bicycle producer. In three to four sentences, explain why you are willing to supply the most bicycles at the highest price. -
## Math

Amy bought a diamond ring for $6,000. If the value of the ring increases at a constant rate of 5.8% per year, how much will the ring be worth in twenty-one years? -
## To @Bosnian

I posted a follow up question to your answer to my recent question about a sum of a series.Hope you can check it. Thank you! -
## Math

How do we find the sum of n terms of the series, 1+(4/7)+(7/49)+(10/343)+..... I know that it can be written as a combination of an arithmetic and geometric progression. 1=(4+3r)/(7^m) ; (r=-1 , m=0) 4/7=(4+3r)/(7^m) ;(r=0,m=1) But how do we find the sum -
## Math

A and B are two events. P(A/B)=5/11 P(A~B)=9/10 (~ indicates either A or B) P(B)=x How do we find P(A^B')? (^ indicates both A and B) I got, P(A^B)=5x/11 P(A)=(9/10)-(6x/11) Is there any way we can get a relationship between P(A^B) and the required -
## Physics

Your vertical spring accelerometer has a 200 g mass hanging from it. You climb aboard the roller coaster and watch the accelerometer read 0.4 g for 3 seconds while descending and read 1.5 for 2 seconds while climbing the next peak. The car weighs 2000 kg. -
## math

The population of town N increases every year by 2%. What will be the population of this town in 3 years if it is currently nine hundred thousand people. (Round the answer to a whole number.) -
## math

A purchase, with shipping and handling, cost $39.00. What percent of the price of the purchase was spent on shipping and handling if the price of the item was $35.10? -
## math

Find new percentages, and find the actual quantities:75% of 75% of 256 -
## math

The volume of industrial production increased ten times. What was the percent increase? -
## math

The population of town N increases every year by 2%. What will be the population of this town in 3 years if it is currently nine hundred thousand people. (Round the answer to a whole number.) Please help -
## math

A tank containing 64 gallons lost 6 1/4 % through leakage. How much was left in the tank? -
## science

A transverse wave has an amplitude of 5 cm, a frequency of 60 Hz and a distance from crest to next trough of 15 cm. Identify the wavelength of this wave. Please someone help asap I cant figure this out. Is there a formula? -
## physics

Radon 86222Rn is a radioactive gas with a half-life of 3.82 d. If there are initially 400 decays/s in a sample, how many radon nuclei are left after 2 d ? Please help, I don't understand how to do this. -
## math

Can someone help me complete the perfect square with this trinomial, I don't understand how to do it. Thanks 1/(x^8) -1/(x^4) +1 -
## Physics

In a single-slit diffraction pattern, the distance between the first and second minima is 4.2cm on a screen 3.8m from the slit. Find the slit width given that the wavelength of the light is 530nm. Answer in mm Somebody please help! -
## Math

Find the probability that with one spin, the spinner will not stop on A. Write the answer as a reduced fraction. letters - E A D E F C A B Counter Clockwise -
## Trigonometry

A building 200 feet tall casts an 80 ft long shadow. If a person looks down from the top of the building which of the following is the measure of the angle between the end of the shadow and the vertical side of the building to the nearest degree? I -
## Physics

You want to jump from an 8.2 m high building to a 10 m high building. The gap between the buildings is 2.4 m, and you can run fast enough so that your speed as you leave the edge of the lower building is 7.0 m/s. What range of launch angles will allow you -
## CHEMISTRY!!

What intermolecular forces are responsible for neoprene's stretchiness? -
## geometry

Why must the compass opening be greater than 1/2 of the segment when construction a perpedicular bisector -
## Accounting

Herring Wholesale Company has a defined benefit pension plan. On January 1, 2016, the following pension related data were available: ($ in 000s) Net gain–AOCI $ 350 Accumulated benefit obligation 3,170 Projected benefit obligation 3,200 Fair value of -
## Calculus

For what values of the constants a and b is (1,3) a point of inflection of the curve y=ax^3+bx^2? -
## Maths

I have a patio which is 3m wide. The roof of this consists of sheets of plastic which are 900mm wide. I have used as few sheets as possible and made all overlaps the same width. What is the width, in millimetres, of this overlap? A. 100 B. 150 C. 200 D. -
## Maths

If it is 9am now, what time will it be in 2003 hours from now? Mental way please. -
## Econ math/logarithms

If log with base b (2)=0.39 and log with base b (3)=0.61 evaluate the following. log with base b (8). Simplify your answer. How to start? I thought I am supposed to write log base b 2^3 but I don't seem to get an answer that would fit. -
## Maths

Within a square land, Asmo cut out a rectangular land with width of 10 meters (as shown below), the remaining land’s area is 1575 square meters. The area of cut out rectangular land is ______ square meters. -
## Calculus

A 5ft tall person is walking toward a light 20ft off the ground at 8 ft/sec. What is the rate of change of the length of the persons shadow when they are 15ft away from the light? What is the speed of the tip of the shadow moving? -
## math

An age that is at least 25 years old.. Translate to inequality -
## data management gr.12

The Infinity Club consists of 5 boys and 6 girls. How many working groups of 5 people can be formed with: a)no restrictions (my answer is 11C5) b)all boys (is this correct 5C5) c)all girls (answer 6C5) d)more girls than boys (6C4x5C1 +6C3x5C2) e)more boys -
## data management

How many ways the letters in BIOENGINEERING be arranged if B must not be next to the O. Thanks in advance (is this correct 14!-(13!x2!) -
## data management

There are 5 rock songs, 6 country songs, and 3 hip-hop songs. How many different albums can be formed using the songs if the album should contain at least 1 rock song and 1 country song? -
## Physics

A ball is raised to a height of 30.0m above the ground. What would its velocity be when it has fallen to a height of 15.0m above the ground. (You must solve this as a conservation of energy problem, and can do it in one step!) Any help would be -
## Math/Algebra

The equation is Z^2-8+12/Z^2+Z-6 I got this far (Z-6)(Z-2)/(Z+2)(Z-3) It needs to be simplified further, as far as my understanding (Z-2) and (Z+2) cannot be cancelled out. -
## Chemistry

When 1.5 grams of salt are added to 12.0 grams of water and the salt dissolves, what is the mass of the system? -
## Calculus 1

sand is being poured onto the ground forming a conical pile whose height equals 1/4 of the diameter of the base. The sand is falling at a rate of 20cm^3/sec. How fast is the height of the sand pile increasing when it is 3cm high? -
## science

For the reaction 2N2O(g) ⇌ O2(g) + 2N2(g), what happens to the equilibrium position if the volume decreases? A. does nothing B. shifts to the left C. doubles D. shifts to the right -
## Optics (pls help)

To save expenses, you would like to buy the shortest mirror that will allow you see your entire body, should the mirror be A) Half your height B) Two-thirds your height or C)equal to your height ? Does the answer depends on how far away from the mirror you -
## Algebra

C the power of two+18c-175=0 Help please? -
## Physics

The A above middle C has a frequency of 440 Hz. If you play this note on a piano and the piano string oscillates with an amplitude of 0.55 mm, what is the maximum acceleration of the string? -
## Chemistry

Spontaneous reactions ________. always release free energy*** always result in increase disorder of the system always take place at a rapid rate are always exothermic -
## Chemistry

Which of the following changes would shift the reaction shown here to the right (product side)? 4HCl (g) + O2(g) < = > 2Cl2 (g) + 2 H2O (g) addition of Cl2*** decrease of pressure increase of pressure removal of O2 -
## Chemistry

Which of the following changes would shift the reaction shown here to the right (product side)? 4HCl (g) + O2(g) < = > 2Cl2 (g) + 2 H2O (g) addition of Cl2*** decrease of pressure increase of pressure removal of O2 -
## Chemistry

At what stage of a reaction do atoms have the highest energy Product stage Reactant stage Transition state stage*** The stage of the highest energy depends on the atom -
## Chemistry

When 2.0 g of solid NaOH (∆Hsoln = -445.1kJ/mol) dissolves in 10L of water, how much heat is released? 445.1 kJ 44.51 kJ 22.26 kJ 11.13 kJ*** -
## Chemistry

Calculate the energy required to produce 5.00 mol of Cl2O7 on the bases of the following balanced equation. 2Cl2(g) +7O2(g) +130kcal - - > 2 Cl2O7 5.00 kcal 65 kcal*** 130 kcal 325 kcal -
## Chemistry

What does the symbol ∆H stand for? one Calorie given off by a reaction the heat capacity of a substance*** the heat of a reaction for a chemical reaction the specific heat of a substance -
## Chemistry

Which of the following is the correct unit for specific heat? degree C*** Cal cal/g cal/(g*deg C) -
## Chemistry

The heat capacity of an object depends in part on its enthalpy mass potential energy*** shape -
## Chemistry

When your body breaks down sugar completely, how much heat is released compared to burning the same amount of sugar in a flame? The body releases___ less heat than the flame*** more heat than the flame same amount of heat as a flame the body releases so -
## Chemistry

What would likely happen if you were to touch a metallic beaker in which an endothermic reaction were occurring? The beaker would probably feel cooler than before the reaction started. The beaker would probably feel warmer than before the reaction -
## Geometry

Segment AD is perpendicular to the radius of circle (B) and the radius of circle (c). If radius BA=6in, segment AD=21in and radius CD=16in, find the length of BC to the nearest tenth of an inch. -
## math

The area of a plot of land is 2496 square meters. A small part of the land is fenced. The ratio of the area of the plot of land to the area that is not fenced is 48:31. What is the area of the land that is not fenced? (5th grade math) -
## Chemistry

A sample of sulfur hexafluoride gas (SF6) occupies a volume of 3.230 Liters at 7.011 x 101 oC. Assuming the pressure is constant, what will the final temperature be (in o C) if the volume is increased to 7.350 Liters? -
## Physics

A plane travels 1000 km at an angle of 40 degrees East to North, then changes direction and travels 500 km at an angle of 20 degrees North to East. What is the magnitude and direction of the planes total displacement? -
## Chemistry

How many grams of MgCl2 would be required to make 440 g of magnesium ? -
## Physics

The human heart discharges 75ml of blood at each beat against the pressure of 0.1mmHg. Calculate the power of the heart assuming that the purse frequency is 80 beats per minute.(density of mercury is 13.6*10^3 Kg/m3) -
## PHYSICS!!

After giving an intense performance, a confused and disoriented flautist has wandered onto the motorway! They are playing a constant 300Hz on their flute and are essentially stationary If you are driving along the motorway at 100 km/h(27.8 m/s). What is -
## AP Physics

Two identical, small balls are suspended by separate 0.25m threads that are attached to a common point on the ceiling. Each ball has a mass of 8.0 x 10^-4 kg. Initially the balls are uncharged and hang straight down. They are then given identical positive -
## PHYSICS!!

In its search for flying insects, a bat uses an echolocating system based on pulses of high frequency sound. These pulses are 2.0 ms in duration, have a frequency of 50 kHz, and an intensity level of 100 dB at 1.0 m from the bat’s mouth. Assume the bat -
## PHYSICS HELP!!

(a) Suppose 10 astronauts are sent to Mars and then back to Earth. The average power usage of each astronaut is 10,000,000 joules per day. What is the average power usage of each astronaut in watts and horsepower? (b) It will take approximately 2 years for -
## Math

Three Bases and home plate make a diamond that is 90 feet on each side. What is the perimeter of the diamond? -
## Chemistry

Calculate how many grams of MgO that can be produced from 4.58 of Mg metal and 0.99 of O2 gas. Recall the balanced reaction is: 2 Mg (s) + O2 (g) 2 MgO (s) And the answers to part one were: Moles of MgO from 4.58 g Mg = 0.1884 Moles of MgO from 0.99 g O2 = -
## Chemistry

If 12.01 g of Mg metal and 6.56 g of O2 gas are reacted, 1) How many moles of MgO can be produced from the given mass of Mg? 2) How many moles of MgO can be produced from the given mass of O2? 3) From the above calculations, determine which of the -
## Chemistry

If 12.01 g of Mg metal and 6.56 g of O2 gas are reacted, 1) How many moles of MgO can be produced from the given mass of Mg? 2) How many moles of MgO can be produced from the given mass of O2? 3) From the above calculations, determine which of the -
## Chemistry

Given that you are starting with 20.816 grams of Fe and 7.079 grams of O2, what is the THEORETICAL YIELD of Fe2O3 in moles? -
## Math

A certian recipe asks for 5/8 cup of granola. How much is needed to make 1/9 of a recipe? -
## Algebra

A campground consists of 8 square campsites arranged in a line along a beach. The distance from the edge of a campsite to the water at the end of the beach is 5 yards. The area of the campground, including the beach, is 1102 square yards. What is the width -
## Physics

A missile is fired with a launch velocity of 15000 ft/s at a target 1200 miles away. At what angle must it be fired to hit the target? Use g = 32 ft/s.s -
## Math

The pool is partially filled with water. The volume of the water in the pool is 45 cubic feet. How deep is the water? A.0.5 ft B.1.5 ft C.2.5 ft** D.3.5 ft Am I right? -
## Chemistry

A flask of hydrogen gas is collected at 1.023 atm and 35 degrees C by displacement of water at 35 degrees C is 42.2 mm Hg. What is the partial pressure of hydrogen gas in the flask? Not exactly sure where to start with this question, or what formula to -
## Differential equation (urgent pls!!!)

Reduce the differential equation below to an exact equation (X - 2siny + 3)dx -(4siny - 2x + 3)dy=0. The problem here is how to solve for the integrating factor...any help pls? -
## maths(Differential Equation)

Solve the differential equation below (Y + y^3/3 + x^2/2)dx + 1/4(1 + y^2)xdy=0 -
## Accelerated algebra

Comet C has an elliptical orbit of eccentricity 0.9638 with the sun at one focus. The greatest distance of the comet from the sun is 2940 million miles. Find the least distance between the comet C and the sun. -
## Physics

Electrons in a narrow beam travelling at a steady speed of 5 x 10^7 ms^-1 are directed into the space between two oppositely charged parallel plates 50mm apart. The potential difference between the plates is 2500V. The initial direction of the beam is -
## Physics - Electrons (Inside the atom)

A beam of electrons is directed into uniform electric and magnetic feilds that are at right angles to one another and to the beam direction. The strength of the magnetic feild is 55 mT; the electric feild strength is adjusted to 600 kV m^-1 when the beam -
## Calculus

Find the area of the region bounded by the graphs of y = x, y = 6 - 2x, and y = 0. (4 points) 3 6 9 None of these Please help I don't know how to do this -
## Algebra

(60/x)x66=400 -
## Science (Physics)

A ball is projected horizontally from the top a hill with a velocity f 30mls. If it reaches the ground 5seconds later, the height of the hill is? -
## Science (Physics)

A ball is projected horizontally from the top a hill with a velocity of 30mls. If it reaches the ground 5seconds later, the height of the hill is? -
## College physics

a person drives northward (90 degrees) at 15m/s in a truck that weighs 2500kg. a second person driving a car that weighs 1600 kg drives southwest (225 degrees) at 16 m/s. They have a perfectly inelastic collision. What is the direction and speed of the two -
## science

a horizontal beam 6.8m long of mass 15kg is supported by pillars of 0.2 of each end. There is a man of mass 85 kg standing 1.7kg from one end of the beam .draw a diagram showing the forces acting on the beam in this equilibrium condition .calculate the -
## World history

What influenced the scientific revolution? -
## math

The discounted price of a book is 85% of the original price. This is a savings of $3. A sales tax of 8% will be added to the discounted price. What is the original price? the discounted price? and the tax? -
## Math

4x(x-2)=(2x+1)(2x-3) need help to solve