10/19/22

Determine the intervals on which the function is concave up or down. (Enter your answers using interval notation. If an answer does not exist, enter DNE.) f(𝜃) = 19𝜃 + 19 sin^2(𝜃), [0, 𝜋]
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10/19/22

What is the rate of change of its total surface area when its radius and height are 20 in and 50 in respectivley?

A right cylindrical ballon is being inflatend in such a way that theradius and height are both increasing at the rate of 1in/s and 3in/srespectivley. What is the rate of change of its total... more
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10/18/22

Find a formula for P(x).
The polynomial of degree 4, P(x) has a root of multiplicity of 2 at x=2 and roots of multiplicity 1 at x=0 and x= -2. It goes through the point (5,220.5)P(x)= ?
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10/18/22

Math question im having trouble with
QuestionTrain A and train B leave a central station at the same time. They travel the same speed, but in opposite directions, with train A heading towards station A, and train B heading towards... more
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10/18/22

Find the absolute extrema of the function on the closed interval. y = x2 − 8 ln x, [1, 5]
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10/18/22

Find the maximum and minimum values of y = 𝜃 + 2 cos(𝜃) on the interval [0, 2𝜋].
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10/17/22

Solve the system of linear equations using matrices.
A state government borrows $2,000,000 at simple annual interest. Some of the money is borrowed at 7%, some at 8.5%, and some at 9.5%. Use a system of linear equations to determine how much (in... more
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10/16/22

use cylindrical shells to find the volume of the solid generated when the region enclosed by the given curves is revolved about the x-axis.
y= x2 , x=2 , y= 0 I got 40pi for my final answer I want to confirm if it is correct or not. I was told it was wrong by my auto grader.
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10/16/22

use the cylindrical shells to find the volume of the solid generated when the region enclosed by the given curves is revolved around the y-axis
y=ex^2 , x = square root 2 , x = square root 3 , y = 0 I got negative pi e but it said my answer was wrong I was wondering if anyone could confirm if my answer is correct or not?
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10/16/22

ugh help please
 population numbers 14,000 organisms initially and grows by 7.4% each year.Suppose PP represents population, and tt the number of years of growth. An exponential model for the population can be... more
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10/16/22

find the unknowns A, B, C, and D from the following equation
-1/[3s(s+1)(s-3)2]=A/3s + B/(s+1) + C/(s-3) + D/(s-3)2
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10/16/22

verify cot(x) + cot(y) / tan(x) + tan(y) = cot(y) cot(x)
verify the identity
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10/16/22

Can someone please help with my Quadratic Functions homework in Math?
NASA launches a rocket at t=0 seconds. Its height, in meters above sea level, as a function of time is given by h(t) = −4.9t^2 + 241t + 402 Assuming that the rocket will splash down into the ocean,... more
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10/15/22

I am stuck understanding this question using chain Rule
Suppose thatf(x)=3x(5−4x)^3.Find an equation for the tangent line to the graph of f at x=1.y=
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10/15/22

At which points does the graph of the f(x) have horizontal tangent line?
(2x^2-2x-1)/(x^4+1) ï»ż
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10/14/22

How to verify this identity, with steps
cos^2x/tanxsinx+tanx=(1-sinx)/tanx
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10/13/22

An augmented matrix that represents a system of linear equations has been reduced using Gauss-Jordan elimination. Write a solution represented by the augmented matrix.
An augmented matrix that represents a system of linear equations has been reduced using Gauss-Jordan elimination. Write a solution represented by the augmented matrix.1 0 0 : 90 1 0 : -30 0 ... more
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10/13/22

Solve the system of linear equations using matrices.
Use a system of linear equations to find the quadratic function f(x) = ax2 + bx + c that satisfies the given conditions. Solve the system using matrices.f(−2) = −3,  f(1) = −6,  f(2) = −19f(x) =    
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10/13/22

Angle Terminology with Equations
∠A and ∠B are vertical angles. If ∠A=(x+12)∘ and ∠B=(6x−8)∘, then find the measure of∠B.what am I supposed to do when there are 2 xs I know they are equal to each other but even than I still cant... more
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10/13/22

i need help asap
Alex, Cameron and Sam are all taking part in a 400 m race.They are each running at a different constant speed.Alex is running 12% faster than Cameron, whilst Sam is running 2% slower than... more
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10/13/22

inverse functions

what is the inverse equation fory=1/2x+8
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10/13/22

The points O, P, Q and R all lie on the same line segment, in that order, such that the ratio of O P : P Q : Q R OP:PQ:QR is equal to 5 : 6 : 1. 5:6:1. If O R = 36 , OR=36, find O Q . OQ.
I need help
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10/12/22

Math help for grandma

Newton says the product of three digit number and a one digit number is always a three digit number is newton correct please explain and show example
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10/12/22

Having trouble these problems
A rectangular sheet of paper with perimeter 51 cm. is rolled into a right cylinder. If xx represents the length of the paper, that then becomes the circumference of the open base of the cylinder.... more
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10/12/22

Gas is escaping from a spherical balloon at the rate of 12 ft3/hr. At what rate (in feet per hour) is the radius of the balloon decreasing when the volume is 400 ft3?
Gas is escaping from a spherical balloon at the rate of 12 ft3/hr. At what rate (in feet per hour) is the radius of the balloon decreasing when the volume is 400 ft3?
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