07/15/19

Calculus Question (Really need help on this one!)
Find the length of the arc of the polar curve r= sin2 (∅/2) from ∅=0 to ∅= pi
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07/12/19

three times a first number decreased by a second number is 13. The first number increased by four times the second number is -26.
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06/30/19

If a circuit has a resistance of 18 Ω and a current of 15 A, what is the voltage?
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06/28/19

Finding work done in an inclined plane
I'm trying to solve a textbook problem that says:A boy in a wheelchair (total mass 47.0 kg) has speed 1.40 m/s at the crest of a slope 2.60 m high and 12.4 m long. At the bottom of the slope his... more
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06/28/19

Peter can paint a room in 5 hours, Paul can paint a room in 6 hours, Neil can paint a room in 7 1/2 hours and Mary can paint a room in 3 3/4 hours.
Which two painters above can team up to paint a whole room in 3 hours?Write and solve a Rational Equation that shows you are correct. Please show your work.
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06/27/19

A rectangular pool measuring 6m by 3m is to have a path surrounding it. If the total area of the pool is to be 31cm^2, find the width (x cm) of the path
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06/26/19

CAN SOMONE HELP ME OUT ON THIS

Choose the equation that represents the line that passes through the point (−1, 6) and has a slope of −3.A.y = −3x + 3 B.y = −3x − 6 C.y = 3x − 3D.y = 3x − 1
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06/24/19

exponential problem
The count in a bacteria culture was 700 after 15 minutes and 1800 after 30 minutes. Assuming the count grows exponentially,What was the initial size of the culture?     Find the doubling... more
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06/24/19

Find the limit (if it exists). lim x→0− x+8/cot x
I am confused as to how to find the limit for this questions as x approaches ) from the left. The cot portion is throwing me off a bit. Any help would be great! Cheers :)math
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06/23/19

How long untile projectile hits ground?
A projectile is shot vertically from ground level. Its height, in feet, after t seconds is given by h=88t-16t2. How long will it take the projectile to hit the ground?
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06/21/19

The height y (in feet) of a ball thrown by a child is y=−112x^2+6x+3
The height y (in feet) of a ball thrown by a child is y=−112x^2+6x+3where x is the horizontal distance in feet from the point at which the ball is thrown.(a) How high is the ball when it leaves the... more
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06/21/19

Integral Question
Set up, but do not evaluate, the integral which gives the volume when the region bounded by the curves y = In(x), y = 2, x = 1 is revolved around the line y = -2.
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06/20/19

Find the equation of the tangent line that passes through the point. f (t) = t^2 - 6 t - 1, (2, -3)?
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06/19/19

How do I find all angles, 0≤theta<360, that satisfy the equation below, to the nearest tenth of a degree: 8cos^2theta+6cos theta+6= 8cos theta+9?
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06/19/19

A steel tube, which is closed at both ends, is filled with air. If the next harmonic frequency is 60 Hz, what is the fundamental frequency?
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06/17/19

Consider the solid shaped like an ice cream cone that is bounded by the functions z=x^2+y^2 and z=18−x^2−y^2. Set up an integral in polar coordinates to find the volume of this ice cream cone.

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06/17/19

Evaluate the triple integral ∭xdV where the region is the solid bounded by the paraboloid x=5y^2+5z^2 and x=5
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06/16/19

The half-life for the radioactive decay of calcium-47 is 4.5 d. If a sample has an activity of 5.0 Ci after 27 d , what was the initial activity of the sample?
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06/14/19

hi i need some help
given that f(X) = ax+b and f(2)=13 and f-1 (3) =0 find a and b
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06/13/19

a rectangular field is to be enclosed with 240m of fence. let x be the length of the field.express the area of the field as a function of x
a rectangular field is to be enclosed with 240m of fence. let x be the length of the field.express the area of the field as a function of x.
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06/12/19

7.3 prob 3 Use the method of cylindrical shells to find the volume V of the solid obtained by rotating the region bounded by the given curves about the y-axis:

y=5e^(-x)^2, y=0, x=0, x=1.1The circumference of a typical shell= 2pixThe height of this shell= 5e^(-x^2)Thus the volume V= ?and dx= ?I figured out the answers to the first two, but now I'm stuck.... more
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06/12/19

Physics 1 word problem. PLEASE HELP!! :))

Planet X has a mass of 7.91023 kg and Moon Y has a mass of 3.51018kg. The average distance between the two bodies is approximately 750,000 km. If you were in a rocket flying in a straight line from... more
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06/11/19

Given that y=1/ (3x-2). How to find the value of dy/dx at the point (1,2)?
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06/07/19

Find the surface area of x = y^2 + z^2 inside y^2 + z^2 = 9?
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06/07/19

solve cos x = -cos 2x for 0 <=x<2pi

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