1,644 Answered Questions for the topic Pre Calculus

16h

#### The table of values below shows the rate of water consumption in gallons per hour at selected time intervals from t = 0 to t = 12.

The table of values below shows the rate of water consumption in gallons per hour at selected time intervals from t = 0 to t = 12.Using a right Riemann sum with 5 subintervals estimate the total...
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16h

#### Which of the following functions grows the fastest as x goes to infinity

a)2xb)ln(x)c)sin(x)d)x20my answer is d

1d

#### The graph of f ′(x) is continuous and increasing with an x-intercept at x = 0. Which of the following statements is false?

a)The graph of f is always concave up.b)The graph of f has an inflection point at x = 0.c)The graph of f has a relative minimum at x = 0.d)The graph of the second derivative is always positive.

Pre Calculus

1d

#### how to solve this problem listed below.

If tan(θ)= 24/10, 0 ≤ θ ≤ π2, thenSEC θ= COS θ= SECθ=

2d

#### Using 4 equal-width intervals, show that the trapezoidal rule is the average of the upper and lower sum estimates for the integral from 0 to 4 of x squared, dx

Using 4 equal-width intervals, show that the trapezoidal rule is the average of the upper and lower sum estimates for

2d

#### Precalculus help

If cos A=⅗, A is in quadrant 4, and cos B=⅘, B is in quadrant 1, then sin(A+B) = ____?

2d

#### Precalculus question

What is the solution set of the equation sin^2θ = 2sinθ over the interval 0º ≤ θ < 360º?

2d

#### Precalculus question

A 6m ladder leans against a vertical wall at an angle of 70º to the ground. What equation can be used to find the height the ladder reaches up the wall? I got cos70º = x/6, is that correct?

2d

#### Precalculus question

The area of a sector of a circle with radius 5 cm is 10 cm^2. Find the central angle in radians (x in the diagram)

3d

#### Pre calc question

Two dogs are 15 feet from each other. Dog A is 20 feet from the favorite toy in the house. Dog b is an unknown distance from the toy, but the angle made from the toy to each dog is 34°. What is the...
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3d

#### Finding Unit Vector that is Perpendicular

If vector b=[3,6,2] and vector c=[0,0,8], find a unit vector perpendicular to both vector b and c.

3d

#### Given f(x) > 0 with f ′(x) < 0, and f ″(x) > 0

Given f(x) > 0 with f ′(x) < 0, and f ″(x) > 0 for all x in the interval [0, 2] with f(0) = 1 and f(2) = 0.2, the left, right, trapezoidal, and midpoint rule approximations were used to...
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3d

#### The rate of decay in the mass

The rate of decay in the mass, M, of a radioactive substance is given by the differential equation , where k is a positive constant. If the initial mass was 100g, then find the expression for the...
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3d

#### The slope of the tangent to a curve at any point (x, y) on the curve is negative 1 times x divided by y . Find the equation of the curve if the point (2, -2) is on the curve.

A)x + y = 0B)x2 - y2 = -2C)x2 + y2 = 16D)x2 + y2 = 8I believe the answer is D

3d

#### The slope of the tangent to a curve at any point (x, y) on the curve is x divided by y . Find the equation of the curve if the point (2, -3) is on the curve.

A) x2 + y2 = 13
B) x2 + y2 = 25
C) x2 - y2 = -5
D) x2 - y2 = 5

3d

#### Find the particular solution to y ' = sin(x) given the general solution is y = C - cos(x) and the initial condition y of pi over 2 equals 1

a) -cos(x) b) 2 - cos(x) c) -1 - cos(x) d) 1 - cos(x)

4d

#### Pre-calc question

A tangent line to a circle is a line that intersects the circle at exactly one point. The tangent line is perpendicular to the radius at the point of contact. Which an equation in point-slope form...
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