15,254 Answered Questions for the topic precalculus

Precalculus

07/24/23

If an elliptic race track is 100 yards long and 20 yards wide, then how far apart are the foci?
a. b. c. d. 
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Precalculus

07/24/23

Uranus is approx 2.74 x 10^9 km away from Sun at perihelion and 3.00 x 10^9 km at aphelion. Find eccentricity of Uranus's orbit given that the perihelion is r = a(1 - e) and aphelion is r = a(1 + e).
a. e ≈ 0.0853 kmb. e ≈ 0.0453 kmc. e ≈ - 0.0453 kmd. e ≈ -0.0853 km
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Precalculus

07/24/23

True of False? The equation of a parabola with its vertex at the origin and its directrix y = 7/4, is the equation x^2= -7y.
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Precalculus

07/23/23

PRECAL HW REVISED

Home Mortgage A $120,000 home mortgage for 35 years at 7 1/2% ( seven and a half) has a monthly payment of $809.39. Part of the monthly payment is paid toward the interest charge on the unpaid... more
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07/23/23

algebra 2 math help urgent!!
For decades, hoax artists have been going out into grain fields to make crop circles like the one shown below. Though many people believed these crop circles to be the work of aliens we now know... more
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Precalculus

07/22/23

PRECAL HW question

Home Mortgage A $120,000 home mortgage for 35 years at 712% has a monthly payment of $809.39. Part of the monthly payment is paid toward the interest charge on the unpaid balance, and the remainder... more
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Precalculus

07/22/23

The doubling period of a bacterial population is 20 minutes.
At time t=120 minutes, the bacterial population was 60000. What was the initial population at time t=0 ? Find the size of the bacterial population after 4 hours
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Precalculus

07/22/23

Precalc question
You go to the doctor and he gives you 17 milligrams of radioactive dye. After 16 minutes, 7.5 milligrams of dye remain in your system. To leave the doctor's office, you must pass through a... more
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Precalculus

07/20/23

secxcscx(tan x + cot x) = 2 + tan^2 x + cot^2 x
solve secxcscx(tanx + cot x) on the left hand side which equals 2 + tan^2 x + cot^2 x
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Precalculus Math

07/17/23

PRECAL HW MATH HELP
Two particles are moving in the x-y plane. They move along straight lines at constant speed. At time t, particle A’s position is given by x = t + 2, y = 1/ 2 t − 3 and particle B’s position is... more
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Precalculus

07/17/23

Precal: : Maximum

A Norman window is a rectangle with a semicircle on top. Suppose that the perimeter of a particular Norman window is to be 24 feet. What should its dimensions be in order to maximize the area of... more
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Precalculus

07/17/23

QUADRATIC FIT! PLEASE HELP
1) Find the quadratic the fits the table values: x -4 -2 0 2 4 6 y 3 -3 -6 -6 -3 3 2) comment on various applications using quadratic modeling.
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Precalculus Math Calculus

07/17/23

Confused on where to start with finding the slope if you are given the secant line slope
The table gives the slope of the secant line through the points P(1,-3) and Q(x,y) on the graph of f(x)=x2-4. Q(x,y) slope (1.01,-2.98) 2.0 (1.1,-2.79) 2.1 (1.5,-1.75) 2.5 (2,0) 3.0 Which... more
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Precalculus

07/12/23

Do you know the relationship between the unit circle and the special right triangles?
I can help make memorizing the unit circle easy!
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Precalculus

07/12/23

Transform the equation r−5⋅sin(θ) = 5⋅cos(θ) to an equation in x and y.
A) x2 + y2 + 5y = 5xB) x2 + y2 - 5y = 5xC) x2 + y2 = 0D) None of the above
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Precalculus

07/12/23

A golf ball is driven into the air at a speed of 90 miles per hour and an angle of 450 from the horizontal. Express the velocity in vector form.
a. <25√2 ,25√2>b. <45√2 ,45√2>c. <25√2 ,45√2>d. <45√3 ,45√3>
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Precalculus

07/08/23

Assume that the height of your cylinder is 6 inches. Consider A as a function of r, so we can write that as A(r)=2πr2+12πr. What is the domain of A(r)?
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Precalculus

07/07/23

What type of symmetry does the following polar equation have? r = 2cos(4Θ)
a.About the originb.All of thesec.About the x-axisd.About the y-axis
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Precalculus Math Algebra 2 Sat Math

07/07/23

Please explain in detail and give the answer so I can cross check my work.
Put the events in order of what is most likely to happen, to least likely to happen. If you were to win a million dollars for winning one of these events, which would you pick to play? Use... more
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Precalculus

07/06/23

Three part question I am struggling with the math
Part a: Assume that the height of your cylinder is 6 inches. Consider A as a function or r, so we can write that as A(r)=2π*r2+12π*r. What is the domain of A(r)? In other words, for which values of... more
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Precalculus

07/06/23

Pre Calculus Help
What is the equation of a polynomial function f(x) with real coefficients that has zeros -3i and -1, that has multiplicity 2.
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Precalculus

07/06/23

Pre Calculus Help
What is the force on a surface of 32 square feet with a velocity of 15 miles per hour.
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Precalculus

07/05/23

Using f(x)=x^2-2x+3, we can determine that f'(x)-2x-2. This means that the​ point-slope equation of the tangent line to the graph of f(x)=x^2-2x+3 at (6,27) is
y - _________ = _________(x - _________).
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Precalculus

07/05/23

Find A so that the function is continuous at 4.
f(x) = x2 , x<4 Ax-8 , x>=4A = ____
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Precalculus Algebra 1

07/02/23

Polynomial function

Find a polynomial fiction of least degree having only real coefficients, a leading coefficient of 1, and zeros of 1-I and 4-4i
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