sal

This page lists questions and answers that were posted by visitors named sal.

Questions

The following questions were asked by visitors named sal.

John has $2.50 in nickels and dimes in his wallet. He has twice as many dimes as nickels. How many of each coin does he have? Let dimes = _____. Let nickels = _______. Equation:________________

a student collects 400 mL of oxygen at 9.80 kPa. if the tempeture remains constant, what volume would this gas occupy at 9.40 kPa

find the slope of the tangent line to the curve (sqrt 2x+4y) + (sqrt 4xy) = 9.16 at the point (1,5) dy/dx method implicit differantiation?

what is the difference between absolute continuity and differential continuity in regards to personality traits?

what is the chemical word equation for neutralizing acid spills? Please help me!!

How many grams of rust form when 453 kJ of energy are released?

the charges for a phone call are $.52 for first min. and $.35 for each additional min. A)graph this step function for 6 minutes.Let x represent time, and f(x) the charge B) for the domain 0<x<=6, what is the range? C)is the relation formed by interchangin...

Solve for n: 5to the second power n + 1= 1/25 express answer as a common fraction.

Five socks colored blue, brown, black, red, and purple are in a drawer. How many combinations of three socks can be randomly selected from the drawer?

A surveyor has a unit pace of 0.9 m/pace. (a) she counts 37 paces while walking From point C to point D. What is the distance between C to D? (b) how many paces should the same surveyor. count to lay out a line roughly 122m long?

what is the height of a cone with a volume of 66 cubic centimeters and a base with a radius of 3 centimeters

c= 5over9 (f-32)

A car leaves an intersection traveling east. Its position t sec later is given by x = t2 + t ft. At the same time, another car leaves the same intersection heading north, traveling y = t2 + 3t ft in t sec. Find the rate at which the distance between the t...

What is the direction (vertical or horizontal) of the transmission axis of Polaroid sunglasses? Give the physical reason for your answer.

solve 1/3(2x-5)=3

if (-12,5) is a pointon the terminal side of an angel 0 find the exact value of six trig funcation of 0

the waiting time for a roller coaster is 20 minutes if 150 people are in line how long will you wait if 240 people are in line

Write an expression in simplest form that represents the perimeter of the polygon. the measure of the sides are 3x, x + 10, 2x + 2, and 5x. Would the simplified expression be 11x + 12?

the average temperature in Hartford can be expressed as t = f(m) where m is month (January = 1, etc.) and t is the average daily high temperature for the month in degrees F. 1) what is the meaning of f'(m)? rate of change of the average temperature (in de...

can someone else me solve this equation? E=mgh

Let t be an angle between π and 3π/2, and suppose sec(t)=−2.6. What is tan(t)? Having a hard time with this one..

If →u and →v are the vectors below, find the vector →w whose tail is at the point halfway from the tip of →v to the tip of →u and whose head is at the point halfway from the tip of →u to the tip of →u−→v. Assume all vectors are in standard position. →u =...

Find the point 4/5 of the way from (7, −10, −4) to (7, 0, 10). Not sure where to go about with this. I'm assuming I find the distance from the two points first..

Find all values of x so that the triangle with vertices A=(−3, 1, x), B=(−3, 4, −2), and C=(−2, −2, 2) has a right angle at A.

Given the following vector X, find a non-zero square matrix A such that AX=0: You can resize a matrix (when appropriate) by clicking and dragging the bottom-right corner of the matrix. X= 2 -8 6 A= _ _ _ _ _ _ _ _ _ Please help, I do not understand this..

A curious child finds a rope hanging vertically from the ceiling of a large storage hangar. The child grabs the rope and starts running in a circle. The length of the rope is 13.0m. When the child runs in a circle of radius 7.0m, the child is about to los...

Let g(x)=(3x+x^2)(2+e^(x−1)). Find g′(1) So I found the derivative (2x+3)(e^(x−1)+2)+(x^2+3x)e^(x−1) I tried plugging in 1 but I'm getting a different answer..

Define a function f(x)= {(x^2-9)/(x-3), if x≠3, {c, if x=3 What value of c makes f continuous at x=3? Is the answer 1?

Find limx→∞ e^−x = 1/e So would the answer be 0?

Consider the following system of linear equations: 2x1+2x2+4x3 = −12 x1+6x2−8x3 = −6 x1−2x2+9x3 = −8 Let A be the coefficient matrix and X the solution matrix to the system. Solve the system by first computing A−1 and then using it to find X. I have solve...

Find conditions on k that will make the matrix A invertible. To enter your answer, first select 'always', 'never', or whether k should be equal or not equal to specific values, then enter a value or a list of values separated by commas. A = −2 3 0 2 k 0 −...

Take the second derivative of 2sin2(x) and evaluate it at x=π/3. So I got the second derivative, -8sin(2x) How do I solve plug in x=π/3 and solve? Do I use the special triangle?

Find the slope of the tangent line to the curve x^2+y^3=5x^2y+5 at the point (1,−1). Please help!

A child starts from rest and slides down a snow-covered hill with a slope angle of 47° from a height of 1.8m above the bottom of the hill. The speed of the child at the bottom of the hill is 3.1m/s. Find the coefficient of kinetic friction between the hil...

A 13.0kg block slides 5.00m down a frictionless surface inclined 31.0° above the horizontal, before being stopped by an originally unstretched spring of spring constant k=346N/m secured to the inclined surface. Find the maximum compression of the spring....

If A, B, and C are 3×3 matrices; and det(A) = −3, det(B) = −2, and det(C) = −1 then compute: det(2A^−1C^−1A^TC^2B^2) = 0

You are making a rectangle from two horizontal rods and two vertical rods. Horizontal rods cost $3 per foot and vertical rods cost $5 per foot. If your budget is $180, then what area is the largest possible area of the rectangle? Not sure how to start it...

You swing a 1.40m long string with a metal ball attached to its end in a vertical circle, such that the speed of the ball does not change but the rope is always taut. The tension in the string when the ball is at the bottom of the circle is 64.0N more tha...

If F(x)+C is the general antiderivative of f(x), then what is the general antiderivative of f(x)+3 ?

Let f be a continuous function on [−3,3], and suppose 7 is the absolute maximum value of f on [−3,3]. Using properties of integrals, this tells us that ∫3,−3 f(x)dx≤−−−. What number goes in the blank? please help..

1. Use special right triangles to state the value of the 6 trig functions for 30 degrees, 45 degrees and 60 degrees. 2. Use the calculator to evaluate the value of the following trig functions. sec 54^o 23’ cot 35^o 21’ 45’’

which event had the greatest impact on the culture of south america

Answers

The following answers were posted by visitors named sal.

at a pressure of 780mm Hg and 24.2 c,a certian gas has a volume of 350.0 mL .what will the volume of this gas under STP.

many rules are loosely enforced.

(0.95 L x 323 K) / 298 K = 1.03 L of Argon gas

There's no typos or no other possible answers...

I had this question too, just chose whatever is close to being right, which is 2.

thank you so much!!! Also, I have one more question.. Assume r>0. Which of the following equals csc(tan−1(r))? Is sqrt1+r2 the correct answer

Do you mind elaborating on that, I don't really understand..

Oh I see now, thank you so much!

thank you for the in-depth explanation

Oh haha that makes so much sense now! Thank you so much.

Is the final answer 0.82 m/s

Nevermind, I got 6.6m/s

Is 19 the right answer?

Ohh I see, I've over-thought this question. Thanks for the help!

So if I am supposed to use special triangles, would the final answer be -3.64

Thank you!! Do you mind checking my other question to see if I did it right?

Yes, that's what I'm getting too, thank you!

I am getting 1.17m, is that correct?

its B lol they made gunpowder