# Mike

Newest questions and responses by Mike-
## Calculus

Find the volume of the solid obtained by revolving the region x=(y-2)^2, the x-axis, the y-axis, about the x-axis. So I understand that you're supposed to use disc method; however, idk where I evaluated wrong. My final answer is 136π/3, but according to

*asked on December 18, 2018* -
## physics

a 230v/30v with 50Hz transformer that has a primary current of 0.6A which supply's number of 30v and 30 watts halogen light bulb. what is the efficiency?

*asked on December 16, 2018* -
## Physics

a 230v/30v with 50Hz transformer that has a primary current of 0.6A which supplys number of 30v and 30 watts halogen light bulb. find the maximum number of bulb can operate. assume that its an ideal transformer and can operate within its rated value.

*asked on December 13, 2018* -
## physics

a 230v/30v with 50Hz transformer that has a primary current of 0.6A which supplys number of 30v and 30 watts halogen light bulb. find the maximum number of bulb can operate. assume that its an ideal transformer and can operate within its rated value.

*asked on December 13, 2018* -
## Chemistry

4NH3(g) +3O2(g) =2N2(g) +6H2O(l) 131.0 g of NH3 is mixed with 221.2 g of O2 and allowed to react. The reaction is complete when the NH3 is consumed. 107.8 g of N2 is formed and 36.60 g O2 remain unreacted. What mass of H2O is produced?

*asked on November 26, 2018* -
## Algebra

Part A: Solve –mk – 90 > 85 for m. Show your work. (4 points) Part B: Solve 3c – 5f = 55 for f. Show your work. (6 points)

*asked on October 31, 2018* -
## Engineering Science

I need help solving this circuit. I don't know where to start in regards to finding the total resistance. Is r4 in series with r5? Circuit is below: i96.photobucket.com/albums/l169/choicedelight/Circuit_3.png

*asked on October 20, 2018* -
## Physics

A dog runs down his driveway with a constant speed of 3.8 m/s for 5.2 s. He then accelerates to a speed of 6.9 m/s in 5.2 s. How long is the driveway?

*asked on October 15, 2018* -
## Engineering Science

Given the circuit below with unknown voltage source and a voltage drop of 2.233 v Volts on resistor R3, with (R1 = 2KΩ, R2 = 1KΩ, R3 = 3.3KΩ, R4 = 4.7KΩ, R5 = 4.7KΩ). Calculate and complete the table below. I need help finding the total voltage,

*asked on October 14, 2018* -
## Calculus

Solve the integral: ∫ x^2+6x-3/(x+3)(x^2+2x+9) I'm stuck. IDK if my setup is correct either. ∫A/(x+3) + ∫Bx+C/(x^2+2x+9) F(x) = A ln(x+3) + ∫Bx+C/(x^2+2x+9) X^2+6x-3=A(x^2+2x+9) + Bx+C(x+3) X^2+6x-3=Ax^2+2Ax+9A+Bx^2+3Bx+Cx+3C

*asked on October 11, 2018* -
## Calculus

Solve the integral: ∫ x^3/(x^+2)^2 I'm stuck. This is my work so far. ∫ A/(x^+2) + ∫ B/(x^2-2)^2 F(x)=A ln(x^2+2)-B/(x^2+2)+C X^3=A(x^2+2)+B

*asked on October 10, 2018* -
## Algebra

If a and b are integers such that a^2− b^2 = 100, what is the greatest possible value of a?

*asked on October 8, 2018* -
## Engineering Science

The meter reads 7.84 mA when the switch is in position A. What is the resistance of R4? R1=220 Ω R2=470 Ω R3=510 Ω VS =12 V I honestly have no clue how to solve this. Please help.

*asked on October 6, 2018* -
## Calculus

Solve the integral: (2x-3)/(x^3-x^2) I'm stuck at finding A. I did partial fractions. I've already found B and C. At x=1, C=-1 At x=0, B=3

*asked on October 3, 2018* -
## Calculus

Solve the integral: 5/x(x^2-4) dx I've done the partial fractions and found B and C, both equaling 5/8; and that's gonna give me 5/8 ln|x^2-4|. I just need help finding A

*asked on October 3, 2018* -
## Physics (Engineering Science)

Find the total resistance (in series) of 1.0 MΩ, 560 kΩ, 5.6 MΩ, 680 kΩ and 10 MΩ So I understand to find total resistance is RT= R1+R2+R3.... but it's the MΩ that's confusing me on what I should do

*asked on September 29, 2018* -
## Physics

A block of mass M rests on a block of mass M1 = 5.00 kg which is on a tabletop. A light string passes over a frictionless peg and connects the blocks. The coefficient of kinetic friction mk at both surfaces equals 0.330. A force of 46.0 N pulls the upper

*asked on September 24, 2018* -
## Calculus

Solve the integral: (1-x^2)^(3/2)/x^2 This is what I have so far. I used trig substitution. x=sin theta dx=cos theta dtheta [1-(sin^2 theta)^(3/2)]*[cos theta dtheta]/(sin^2 theta) [(cos^3 theta)]*[cos theta dtheta]/(sin^2 theta) (cos^4 theta)/(sin^2

*asked on September 23, 2018* -
## Calculus

Solve the integral (x+3)/(x-1)^3 So far, I'm stuck. This is what I have thus far: x+3 = A(x-1)^3/(x-1) + B(x-1)^3/(x-1)^2 + C(x-1)^3/(x-1)^3 x+3 = A(x^2-2x+1) + B(x-1) + C x+3 = Ax^2 - 2Ax +Bx + A - B + C x+3 =Ax^2 + 1(B-2A)x + (A - B + C)

*asked on September 22, 2018* -
## math

what is the surface area of a 10 inch balloon

*asked on September 11, 2018* -
## Geography

Find the precision for each measurement. 120 meters, 7 1/4 inches, 30.0 millimeters

*asked on September 4, 2018* -
## US History

I am having a really hard time with this assignment. Can anyone cross check my answers? Thank you 1.The term participatory democracy applies most accurately to which of the following societies? A. Greece in the fourth century B.C. B. Modern China C. The

*asked on July 4, 2018* -
## Calculus check my answers

1. The general solution of the differential equation dy - 0.2x dx = 0 is a family of curves. These curves are all: a. lines b. hyperbolas c. parabolas (my answer) d. ellipses 2. The table below gives selected values for the function f(x). Use a trapezoidal

*asked on July 2, 2018* -
## chemistry

A car is moving at 45.0 miles per hour. How many minutes would it take to travel 228 km? Given: 1.000 mile = 1.609 km. 189 489 106 31.5

*asked on June 4, 2018* -
## Chemistry

The density of acetone is 0.788 g/mL. What is the volume in mL of a 48 mg sample of acetone? 3.8 x 104 mL 6.1 x 104 mL 6.1 x 10-2 mL 3.8 x 10-2 mL 1.6 x 101 mL

*asked on June 4, 2018* -
## math

A netball team scored 60,42,48 and 46 goals in thier first four matches. a)What is the mean number of goals for the first four matches? b)The team shoots only 39 goals in the fifth match.What is the mean number of goals scored for the fine matches? c) The

*asked on May 20, 2018* -
## MAth

solve equation by factoring 3m^2-8m=35 I need to show full work as well please help

*asked on May 6, 2018* -
## Calculus

By finding the slopes of the tangent lines to the curve of y=(1/3)x^3+5x at the points where x=3 and x=6, find the acute angle between these lines at the point where they cross. I don't have any idea where to start. An explanation would be appreciated.

*asked on April 19, 2018* -
## Calculus

A rocket follows a path given by y=x-1/91x^3 where distances are in miles. If the horizontal velocity is given by vx=1.4x, find the direction of the velocity when the rocket hits the ground (assume level terrain) if time is in minutes. So far I've only

*asked on April 16, 2018* -
## Math

Help! I need the work and how to check it too! Victoria and Georgetown are 36.2 mi from each other. How far apart would the cities be on a map that has a scale of 0.9 in: 10.5 mi?

*asked on April 13, 2018* -
## Calculus

Find any relative max or min points of the given function y=3x^2+12x+17 So far, I have: y'=6x+12=0 2(3x+6)=0 x=-2

*asked on March 31, 2018* -
## Calculus

Find the equation of a normal line to the given curve with the given slope y=(4x-7)^3, slope -1/12, x>0 So far, I have: y'=12(4x-7)^2 12(4x-7)^2=12 4x-7=+1,-1 x=2, x=3/2

*asked on March 30, 2018* -
## Calculus

Find the equation of the line tangent to the given curve with the given slope y=(1/3)x^3+2x^2+5, m=-4 I'm stuck. So far, I have: y'=x^2+4x x^2+4x=-4

*asked on March 30, 2018* -
## Math

Which measure correctly completes that statement? 3,271.5 milligrams=?grams A.0.032715 ML B.5,388.26 ML**** C.538.826 ML D.53,882,600 ML

*asked on March 27, 2018* -
## Math

I need urgent help with these 3 math problems 1. Margaret painted a mural for St. Patrick’s Day and mixed her own green paint. She mixed 3 parts yellow paint with 2 parts blue paint to create green paint. Maureen wanted to also paint a mural with the

*asked on March 23, 2018* -
## pre-calc

A Ferris wheel is 50 meters in diameter and boarded from a platform that is 4 meters above the ground. The six o'clock position on the Ferris wheel is level with the loading platform. The wheel completes 1 full revolution in 8 minutes. How many minutes of

*asked on March 23, 2018* -
## Calculus

A uniform layer of ice covers a spherical water-storage tank. As the ice melts, the volume V of ice decreases at a rate that varies directly as the surface area A. Show that the outside radius decreases at a constant rate.

*asked on March 20, 2018* -
## Trig

Write an equation of the circle described below: Given a circle with the center (5,1) and a point on the circle (8,-2).

*asked on March 14, 2018* -
## Trig

a pilot wishes to fly on a course bearing 45 and with a ground speed of 600 km per hour. If a wind is blowing from the southwest (bearing 315) at 80 km per hour. What must be the heading and air speed of the aircraft?

*asked on March 9, 2018* -
## Math

We have the survey data on the body mass index (BMI) of 648 young women. The mean BMI in the sample was x¯=27.2. We treated these data as an SRS from a Normally distributed population with standard deviation σ= 7.4. Find the margins of error for 90%

*asked on March 7, 2018* -
## Algebra

Solve –(5)–1 A. –1/5 B. –5 C. 5 D. 1/5

*asked on February 20, 2018* -
## Math

Tangent of an acute angle of a rhombus is 3⁄4, whereas its side is 10 cm long. Find an area of the rhombus.

*asked on February 12, 2018* -
## Math

Tangent of an acute angle of a right triangle is 1⁄2. Area of the triangle is 25 m2. Find legs of this triangle.

*asked on February 12, 2018* -
## Math

In a right triangle, one leg is 40 cm long and the hypotenuse is 104 cm long. Find the tangents of its acute angles.

*asked on February 12, 2018* -
## Math

Cosine of a basic angle of an isosceles triangle is 1⁄2, while its area equals 4√3 cm2. Find the lengths of the sides of this triangle.

*asked on February 12, 2018* -
## math

How sensitive to changes in water temperature are coral reefs? To find out, scientists examined data on sea surface temperatures and coral growth per year at locations in the Red Sea. Here are the data: Sea surface temperature 29.71 29.84 30.31 29.66 30.47

*asked on February 9, 2018* -
## Math

The toco toucan, the largest member of the toucan family, possesses the largest beak relative to body size of all birds. This exaggerated feature has received various interpretations, such as being a refined adaptation for feeding. However, the large

*asked on February 9, 2018* -
## Physics

A baseball hit just above the ground leaves the bat at 26 m/s at 45∘ above the horizontal. How far away does the ball strike the ground? How much time is the ball in the air? What is its maximum height?

*asked on January 30, 2018* -
## Calculus

Evaluate slope of a tangent line: y=1-(1/2)x^2, P(2,-1) The answer is supposed to be -1, but I'm getting -2. [1-2-2h-(1/2)h^2]-[-1]/h [-1-2h-(1/2)h^2+1]/h [h(-2-1/2h)]/h -1/2(0)-2 =-2

*asked on January 27, 2018* -
## Algebra

Determine zeros of F(x)= -x^4 + x^2 + 1

*asked on January 25, 2018* -
## Physics

Determine the x-intercepts of the polynomial function y=-6(x+7)^4 + 5. Round to two decimal places, if necessary.

*asked on January 24, 2018* -
## Math

In parallelogram ABCD, AB=10cm, Angle A = 70 gradus, diagonal DB is perpendicular to AB. Find CB, DB, area of ABCD.

*asked on January 24, 2018* -
## Math

A boat travels 9 km due south and then 7 km due west. What angle should the boat make with the north line to return to the base (see figure to the right)?

*asked on January 24, 2018* -
## Math

Find the height of a tree given that it casts a shadow 1.5 m long when the elevation of the sun is 550 (see figure to the right).

*asked on January 24, 2018* -
## Physics

A bullet with a mass of 28 g is fired from a 2.8-kg gun that is stationary, but free to recoil. After the bullet is fired, the gun is observed to be moving at 1.4 m/s [left]. What is the velocity of the bullet?

*asked on January 23, 2018* -
## Physics

A toboggan, with rider, has a combined mass of 60kg at the top of a 5.0m hill. They are given an initial push of 2.0m/s. The distance down the hill was 20m. The velocity at the bottom of the hill is 10m/s. If the actual speed at the bottom was 9m/s, what

*asked on January 23, 2018* -
## Physics

An arrow slows down from 43 m/s to 28 m/s as it passes through an apple. If the 493 g apple was originally at rest and sped up to 0.44 m/s, what is the mass of the arrow?

*asked on January 23, 2018* -
## Physics

An arrow slows down from 43 m/s to 28 m/s as it passes through an apple. If the 493 g apple was originally at rest and sped up to 0.44, what must be the mass of the arrow?

*asked on January 23, 2018* -
## math

3/5 of a revolution represents approximately how many radians? Question 12 options: 6.28 3.14 3.77 108.00

*asked on January 22, 2018* -
## math

how do you find the shape, center, variability, and outliers of a histogram?

*asked on January 16, 2018* -
## English

When you think of separation or isolation, what comes to mind? It might be helpful to brainstorm or create a mind map. What image(s) could you use to symbolize separation? When you choose your symbol, try to find words that rhyme with it, and write them

*asked on January 10, 2018* -
## Math

Carmike Company can further process Product A to produce Product B. Product A is currently selling for $25 per pound and costs $10 per pound to produce. Product B would sell for $32 per pound and would require an additional cost of $10 per pound to

*asked on December 14, 2017* -
## Accounting

Fender Company had the following data for four months. Total Cost Production Units January $50,000 1,000 February$53,750 1,150 March $61,250 1,450 April $65,250 1,610 Use the “high-low” method to calculate the estimated variable cost per unit. A. $25

*asked on December 14, 2017* -
## Calculus

Calculate the area of the region bounded by the graphs of the given equations y=x^2-5x+4 and y=-(x-1)^2 The answer is supposed to be 9/8, but I'm getting -111/8. Idk what I'm doing wrong

*asked on December 12, 2017* -
## Calculus

Find the limit lim tan^2(7x)/9x x-> 0

*asked on December 12, 2017* -
## Math

In 7 days, a group of workers can plant 21 acres. What is their rate in acres per day?

*asked on December 11, 2017* -
## Computers

Convert from binary to decimal (1000)2 - (0011)2 = (?)10

*asked on December 11, 2017* -
## Accounting

A company is considering replacing an old machine which had an initial cost of $100,000 and has $75,000 of accumulated depreciation to date.The company is considering purchasing a new machine which costs $195,000.The old machine could be sold for

*asked on December 11, 2017* -
## Calculus

Solve using chain rule y=(3x^3+1)(-4x^2-3)^4 So far, I have: y'=(3x^3+1)*4(-4x^2-3)^3*(-8x)+(-4x^2-3)^4*(9x^2)

*asked on December 5, 2017* -
## Calculus

Approximate the area under the curve of f(x)=9-x^2 between x=-2 and x=3 by calculating the area of 5 rectangles for both left hand endpoints and right hand endpoints. I have the left hand and right hand endpoints, what I need help in is solving for the

*asked on December 3, 2017* -
## Calculus

Find dy/dx and express the final answer with a common denominator y=ln x^(2(4x-12))

*asked on December 3, 2017* -
## Calculus

Calculate the Riemann sum of the area under the curve of f(x)=9-x^2 between x=-2 and x=3 The answer I come up with is 10/3, but when I solve using integrals, the answer I get is 100/3. Am I doing something wrong?

*asked on December 3, 2017* -
## Calculus

Find dy/dx and express the final answer with a common denominator y=lnx^2(4x-12)

*asked on December 3, 2017* -
## Calculus

Find y that satisfies the given condition dy/dx=20x(5x^2-1)^3; curve passes through (1,3) I took the antiderivative and ended up with 10x^2((5x^2-1)^4/4). I end up with a large number at the end, which I think might be wrong.

*asked on December 2, 2017* -
## Calculus

Differentiate and simplify as much as possible. Cube root(5z+6/-9z+3). The answer should be y'= (23(-9z+23)^2/3)/9(3z-1)^2(5z+6)^2/3) So far, I'm stuck at y'=[23/3(5z+6)(3z+1)][((5z+6)^1/3)/((-9z+3)^1/3)]

*asked on December 1, 2017* -
## Math

We have a trapezoid ABCD and the diagonals intersect in point O. AO : OC = m : n Prove that DO : OB = m : n

*asked on November 30, 2017* -
## Math

We have a trapezoid ABCD and the diagonals intersect in point O. AO : OC = m : n Prove that DO : OB = m : n

*asked on November 29, 2017* -
## Math

Inside a triangle formed by the line 3x+4y=1 and the positive coordinate axis, inscribe a square with three of the vertices on the coordinate axes and one vertex on the line. 1) Find the length of a side of the square. In the triangular region described

*asked on November 29, 2017* -
## Calculus

Find where the function is increasing and where it is decreasing f(x)=2sin(x) on [0,2pi] Thanks

*asked on November 20, 2017* -
## Chemistry

Why are some solutes soluble in water, but others are soluble in cyclohexane?

*asked on November 16, 2017* -
## Math

Imagine a circle of rope, which has twelve evenly spaced knots tied in it. Suppose that this rope has been pulled into a taut, triangular shape, with stakes anchoring the rope at knots numbered 1, 4, and 8. Make a conjecture about the type of the triangle.

*asked on November 13, 2017* -
## Calculus

Find the inflection points y=x^2/x^+3 So far I've found y'=6x/(x^2+3)^2 but I'm stuck in finding y''. So far, I'm at 6(x^2+3)^2-24(x^2+3)/(x^2+3)^4 and the next step says y''=6(-3x^2+3)/(x^2+3)^3=0 and I don't understand how. Thanks

*asked on November 11, 2017* -
## Chemistry intro

H2SO4+2NaOH->2H2O+Na2SO4 1.) How many grams of H2SO4 are needed to produce 135L of water? 2.) How many molecules of water are produced when 12g of sodium sulfate are created?

*asked on November 11, 2017* -
## Calculus

Find the extreme values of the function and determine the intervals where the function is increasing/decreasing expressed in interval notation. x(x-2)^2 So far I've found y'=3x^2-8x+4. Thanks

*asked on November 11, 2017* -
## Physics

A train slows down as it rounds a sharp horizontal turn, going from 90 km/h to 54 km/h in the 15.0 it takes to round the bend. Compute the acceleration at the moment the train reaches 50.0 km/h. Assume the train continues to slow down at this time in the

*asked on October 24, 2017* -
## Chem

So i wrote a net ionic equation, and I believe is wrong. Fe(ClO4)3. I wrote 3H+(aq) + Fe(OH)3(s) = Fe3(aq)+ + 3H2O (l) Had to come up with the acid and base that would form the compound

*asked on October 21, 2017* -
## Calculus

Find dy/dx for y=3tan^-1(x/2). I know the answer is 6/x^2+4 but I'm stuck at y'=3(1/1+(x/2)^2)(1/2)

*asked on October 18, 2017* -
## Physics

Calculate the weight of an object whose Mass is 5kg.(take g=10m\s

*asked on October 18, 2017* -
## Physics

Calculate the weight of an object whose Mass is 5kg.(take g=10m\s

*asked on October 18, 2017* -
## ER Diagram - Database

An online retailer, S record, which sells physical music albums, plans to implement a DBMS to enhance its data management practice and ultimately advance business operations. The requirements collection and analysis phase of the database design process has

*asked on October 1, 2017* -
## Math

Solve for 0 < θ ≤ π sin θ = sin 2θ I get (0,π/3,π,5π/3). Idk what I did wrong.

*asked on September 26, 2017* -
## math

sally and hans started counting at the same time. sally counted on by tens from 300. hans counted back by hundreds. after six counts they had reached the same number. what number did hans start counting from?

*asked on September 20, 2017* -
## physical science

two cars are headed straight for each other, each at a constant speed of 40mph. A. do the two cars have the same speed? b. do the two cars have the same velocity? c. what is the acceleration of each car while moving at a constant speed

*asked on September 18, 2017* -
## Math-college

Tim is making is making a sandwich he has 3 choices of bread, 2 choices of lettuce, 4 choices of meat, and 6 spreads to choose from. How many combinations is he able to make?

*asked on August 17, 2017* -
## algebra-math

A club with 25 members wishes to select a 4-member leadership team. How many ways can this be done? 25x4=100 100 variations in the leadership team Would this be correct by any chance?

*asked on August 16, 2017* -
## algebra-math

Amy is packing her bags for her trip that she won to go on a boat cruise. Amy won 4 tickets to the boat cruise and Amy can only bring 3 people along with her on this trip, but 15 of her friends want to go. How many different types of groups of friends can

*asked on August 16, 2017* -
## Math-college

Here is my problem. I bought my son Tommy, his back to school clothes. I can’t tell you how happy he is too being going back. Tommy now has, 7 Shirts: 7 Pants: 3 pairs of shoes: How many different possible outfits can Tommy make? Answer would be,

*asked on August 15, 2017* -
## algebra-math

When it comes to linear inequalities, these are explained to be similar to a linear equation, but the difference between the two is that the equal signs are replaced with an inequality symbol. It is also explained that when it comes to doing a linear

*asked on August 6, 2017* -
## algebra-math

Make a preferred method of solving a system of linear equations and why. Which method do you prefer? Do you think that matrices make the process easier? Or do you prefer not to use matrices? Once again thank you for any help given on this.

*asked on August 6, 2017* -
## algebra-math

Create a system of linear equations. Explain the steps for solving a system of linear inequalities. Make a system of linear inequalities problem. Please help me with this?

*asked on August 6, 2017*