6,964 Answered Questions for the topic mathematics

Mathematics Math Calculus Ab Calculus

04/12/21

I need some help with math

For 0 ≤ t ≤ 12 , a roller coaster car has position (x(t),y(t)) with velocity vector ⟨10, −tsin(πt/4)⟩ , where x(t) and y(t) are measured in meters and t is measured in seconds. At time ... more
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Mathematics

04/12/21

The number of boys and girls in a club are in the ratio 2:3. there are 21 girls in the club. How many boys are there?
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Mathematics

04/11/21

please help i need help
Mr. Walker invested $65,100 in two banks, one paying 4.5% and the other 6%. If he gets $231 more on the 6% investment than that on the 4.5% investment, find the total annual income from the banks.
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Mathematics Calculus

04/11/21

Using Linear Approximation, estimate Δf for a change in x from x=a to x=b. Use the estimate to approximate f(b), and find the error using the calculator. f(x)=x1/3, a=8, b=10.
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Mathematics Calculus

04/11/21

4 is the cube root of 64. Use the Linear Approximation for the cube root function at a=64 with Δx=1.4 to estimate how much larger the cube root of 65.4 is, i.e., 65.4−−−−√3−64−−√3≈
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Mathematics

04/11/21

Solve for x: ln(6x +3) = 2
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Mathematics Math Maths

04/11/21

Terms and sequence
The first four terms of a number sequence is given as follows:2, 3/2, 4/3, 5/4,...........a) Write down the n th term, in terms of n.b) Is the 229/227 number in this sequence? Explain your answer.
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Mathematics Math Maths

04/11/21

Terms and sequence
The diagrams are made up of hexagons.Diagram 1 = 6 hexagonsDiagram 2 = 10 hexagonsDiagram 3 = 14 hexagonsDiagram 4= 18 hexagonsb) Find an expression, in terms of n, for the nth term of the... more
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Mathematics Math Maths

04/11/21

Sequence and terms
Figure 1= 1 squareFigure 1= 4 squareFigure 1= 7 squareFigure 1= 10 square Write down the formula of n for the number of squares in figure n. Explain whether it is possible for a figure to have 90... more
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Mathematics Math Maths

04/11/21

New ratio of Jar A & B
The ratio of the number of cookies in Jar A to the number of cookies in Jar B is 3:8. Half of the cookies in Jar A are transferred to Jar B. What is the new ratio of the number of cookies in Jar A... more
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Mathematics

04/11/21

Sec,tan,sin,cot,csc
Given θ  in standard position, determine the quadrant in which the terminal side of θ lies.sec θ > 0, tan θ < 0cot θ > 0, sin θ > 0cos θ <0, csc θ> 0
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04/10/21

An investor purchase a machine for 𝑁$ 28371. 00 and expects to sell it for 𝑁$50000. 00 in 5 𝑦𝑒𝑎𝑟𝑠.
What is the expected NPV (Net present Value) for this investment if the investor discount cash flows at 15%?
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Mathematics Calculus

04/10/21

If f(x)=−7ln(3x2 − 3x+1) , then f'(0)=
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Mathematics Math Trigonometry

04/09/21

if a right circular cylinder and oblique cylinder both have a height of 13 inches and diameter of 8 inches, do they have the same volume ?
1) no, the right circular cylinder has a volume of 2,613.81 inches and the oblique cylinder has a volume of 653.45 inches 2) yes, they both have a volume of 653.45 inches 3) no, right circular has... more
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Mathematics Math Math Calculus

04/09/21

How do we solve this integral?

Evaluate the following integral using a change of variables. ∫∫((y-x)/(y+2x+1))^4 dA, where R is th parallelogram bounded by y-x=2, y-x=3, y+2x=0, and y+2x=3R
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Mathematics

04/09/21

hood you find the 17th term of an arithmetic sequence whose first term is 12 and whose common difference is 6?
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Mathematics

04/09/21

Inequality Maths
A train needs 4 hours to go from the first station to the second. If the third station is 120 miles away and the total travel time must be no more than 7 hours, write an inequality that would let... more
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Mathematics

04/08/21

Help with math questions
A pole casts a 5-foot shadow, and at the same time of day a 6-foot-tall man casts a 1-foot shadow. How tall is the pole?
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Mathematics

04/08/21

Write a cosine function that has an amplitude of 4, a midline of 5 and a period of 1
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Mathematics

04/08/21

Area of a triangular flag
A triangular flag has a base of 1 foot and height of 1.1 feet. What is its area in square feet?
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Mathematics

04/08/21

Who can solve this x
3(2−𝑥)−1⋅3(−𝑥−3)=2429
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Mathematics Math Sat Math

04/08/21

this is my math problem

Q#2 The heights (in feet) of a rocket T seconds after its launching is given by                           H = -T3 + 96 T2 +95 T + 20Find out  i). The Speed or velocity of the rocket at... more
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04/08/21

Math Profit Functions

For a certain company, the cost function for producing x items is C(x)=50x+200 and the revenue function for selling x items is R(x)=−0.5(x−120)2+7,200. The maximum capacity of the company... more
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Mathematics Math

04/07/21

Sam bought 2 granola bars and Tesha bought 5 granola bars. Each granola bar has the same price. Write an expression for the total price of the granola bars
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Mathematics Algebra Maths

04/07/21

Figure out the area of a field with a scale.
The scale on a map is 1:50,000. The area of a field on the map is 1.2 square centimetres. Calculate the actual area of the playing field in square kilometres.Here I thought you would multiply... more
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