05/09/20

How many As atoms are there in a 35.7 gram sample of As ?
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05/06/20

How can I find the true mean?
Noise levels at various area urban hospitals were measured in decibels. The mean noise level in 169 ward areas was 61.6 decibels, and the population standard deviation is 4.7. Find the 95%... more
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05/06/20

Find the revenue function R(x) when the marginal revenue is R'(x) =400-0.4x and no revenue results at a production level. What is the revenue at a production level of 1000 units?
Can someone solve this please.
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03/25/19

system of equations application

a 1200-seat theater sells two types of tickets for a concert. Premium seats sell for $40 each and regular seats sell for $20 each. At one event $36,320 was collected in ticket sales with 20 seats... more
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01/20/19

-7x^2=28 Please Answer!!
Solve in steps, please! I need help!
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05/26/18

Why do sine waves cycle between 1 and -1?
In the sine function y=sin(x), why does the sinusoid travel between 1 and -1
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05/26/18

There are 48⋅56 cows spread across 32⋅54 square miles of land. Find the average number of cows per square mile. Round your answer to the nearest whole number.
Hi, i dont understand this math problem
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05/26/18

The winner and runner up of a Tv music contest
The winner and runner up of a Tv music contest had lucrative earnings immediately after the show 's finale. The runner up earned $4 million less than half of the winner's earnings.If their combined... more
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01/10/18

Evaluate the function ƒ(x ) = x 2 + 1 for ƒ(2)
can you help me answer this 
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08/18/17

How many teams participated in the tournament?
In a basketball tournament, 153 total matches are played. Each team played exactly one match with each of the other teams. How many teams participated in the tournament?
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08/10/17

Find the area enclosed between
Find the area enclosed between f(x)=0.8x^2+9 and g(x)=x from x=-4 to x=4.  
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07/30/17

Given a normal distribution with μ = 100 and ơ= 20 , if you select a sample of n = 25, find:
Given a  normal distribution with μ = 100 and ơ= 20 , if you select a sample of n = 25,  find:    What is the probability that Xbar < than 97
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07/29/17

Factor completely: 3x*4−6x*3+9x*2−18x
The numbers after the stars are exponents. Thanks
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07/18/17

Find all solutions in the inerval [0,360)
cos^2(theta)+8cos(theta)+5=0 Answer in degrees
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07/17/17

Calculus Question
If 2y2-xy-x2 = 0, find dy/dx.   And, determine the slope of the tangent at x =1. 
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05/30/17

Solving for distance using a system of linear equations
Two trains leave towns 610km apart at the same time and travel toward each other. One train travels 15 /kmh slower than the other. If they meet in 2 hours, what is the rate of each train?
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05/30/17

How do you solve x^2+3x-5=23 and h^2+h=12 by completing the square?
Step by step
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05/20/17

Statistics question.
Use the given degree of confidence and sample data to construct a confidence interval for the population proportion p.When 332 college students are randomly selected and surveyed, it is found that... more
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05/20/17

Statistics question.
Express the confidence interval -0.129 < p < 0.631 in the form of ± E.
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05/07/17

If n+p=2000 and LCM of n and p is 21879. Then find n and p
P is prime and n is a positive integer
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05/04/17

Math hexpected value help
A company has a choice of four oil fields to buy. Field one has a 25% chance of having 10 million dollars worth of oil, field two has a 33% chance of having 9 million dollars worth of oil, field... more
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05/04/17

Write an equation for option 2 and find how much money would you make on the 30th day.
Suppose a retired professor who lives next door offers to pay you to work for him for the next 30 days. He says he will pay you $500 per day (option 1), or if you would like, he will pay you $0.01... more
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03/28/17

Model various situations with the difference of polynomials. Simplify
A bicycle company produces y bicycles at a cost represented by the polynomial y2+10y+100,000. The revenue for y bicycles is represented by 2y2+10y+500. Find a polynomial that represents the... more
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03/21/17

What is the volume of a 32 gram sample of CH4 gas at STP?
i need this for homework it is very hard  
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03/21/17

The value of y varies jointly with the values of x and z. When x=4x=4 and z=9z=9, the value of y is 360. What is the value of y when x=5x=5 and z=12z=12?
 please help this is timed and i need an answer quick 
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