364 Answered Questions for the topic College Math

College Math Math Help Percentage

05/16/17

Ratios, Proportions, Percentages
Could someone help me go through this question?    If the variable X changed from value=-4 to the value X=-10, what is the percent change? How do you interpret this change?
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05/16/17

Fraction to Percentage help?
Convert percentage in decimals: 2/5% How do I convert that into a decimal?? 
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05/16/17

Scientific Form
how to write this number in scientific form? 1) 4.00068 2)1.0097048
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College Math Fractions Math Help

05/16/17

How do you compare fractions?
Which fraction is bigger? 4 3/8 or 34/7? Would I have to multiply both sides to get the same denominator then compare?
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College Math Math Polynomial Monomials

05/14/17

(3X^2+2X-7) - (2X^2-6X-7) Help with this Monomial & Polynomials question?
Hi, could anyone help me with the monomial & polynomial question? (3X^2+2X-7) - (2X^2-6X-7)
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05/02/17

The price of gasoline in Barcelona is 1.83 euros per liter. How much is this in dollars per gallon?
Word problem
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05/02/17

How many bacteria will there be after 6 hours?
The number of bacteria in a culture is increasing according to the law of exponential growth. After 3 hours, there are 400 bacteria, and after 5 hours, there are 1600 bacteria. How many bacteria... more
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College Math

04/17/17

A cell phone cost a dealer $32 and had a rate of markup based on selling price of 80%. Determine the selling price
Need help 
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College Math

04/08/17

Rectangular sports goal is 8 ft wide and 5th high. Find the area of the opening
I need help don't understand this type of mathematics
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01/30/17

a person on the top of a 160-foot building throws a baseball vertically upward. The quadratic function, s(t)= -16t^2 +64t +160.
a person standing close to the edge on the top of a 160-foot building throws a baseball vertically upward. The quadratic function, s(t)= -16t^2 +64t +160, models the ball's height where s(t) is the... more
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01/21/17

Find the equation of the line prallel to 2x-6y=3 and passing through (-1,-2)
Find the equation of the line prallel to 2x-6y=3 and passing through (-1,-2)
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College Math College Algebra Math Help

12/17/16

Write the equation of the line that has a slope of -2 and passes through the point (2,1):
anybody know how to do this
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College Math Math Calculus Derivative

12/07/16

Derivative of y= (sec5x)^((x^2)-x+2)
Just need the first derivative of this function, struggling with there to begin
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College Math Math Probability Math Help

12/06/16

Probability Help
What is the probability that at least three of the nine justices of the U.S. Supreme Court have the same birthday? Round your answer to the nearest ten thousandth.
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College Math Math Probability Math Help

12/05/16

Probability Help
An unbiased coin is tossed five times. Find the probability of the given event.The coin lands heads at least once.
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12/05/16

What is the angular size of a quarter viewed from a distance of 7 yards? (A quarter is about 1 inch in diameter.)
What is the angular size of a quarter viewed from a distance of 7 yards? (A quarter is about 1 inch in diameter.)   Can someone help me figure out the formula to answer this question? 
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College Math

12/01/16

If a student in the class is to be selected at random, what is the probability that the student selected will be female or a mathematics major or both?
This is a question from my College Mathematics book for the CLEP test. Here is the question again. In a class with to students, 25 of the students are female, 15 of the students are mathematics... more
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College Math Math Geometry Math Help

11/29/16

A picture window has a length of 9 feet and a height of 8 feet, with a semicircular cap on each end.
Window Space. A picture window has a length of 9 feet and a height of 8 feet, with a semicircular cap on each end.How much metal trim is needed for the perimeter of the entire window? ___ft How... more
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College Math Math Chemistry Biochemistry

11/21/16

help with chemistry please!
In the reaction 2KClO3(s) --> 2KCl(s) + 3O2(g)How many liters of oxygen gas at STP are produced from 17.4 g of... more
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11/21/16

Create an exponential function of the the form Q= Q_0
The number of restaurants in a city that has a 780 restaurants in 2013 increases at a rate 2.8% per year. (a)Create an exponential function of the the form Q= Q_0 \times (1+r)^t (where r > 0 for... more
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11/10/16

How do I predict the population growth in 2050 with this problem?
Starting from a 2013 population of 7.1 billion, use the current annual growth rate of the United States, which is about 0.70%, to (a) find the approximate doubling time (use the rule of 70)... more
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11/07/16

How do I find the estimated age of this tree with the diameter?
The diameter of Reginald's tree increases by 0.6 inches each year. A current measurement gives its diameter as 7.92 inches. Estimate the age of the tree. Answer = years   I don't understand what... more
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11/02/16

Math homework help
Pairs of markings, a set of distance apart, are made on highways so that police can detect drivers exceeding the speed limit. Over a fixed distance, the speed R varies inversely with the time T.... more
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11/02/16

Math homework help
The resistance in ohms of metal wire temperature sensor varies directly as the temperature in degrees Kelvin (k). If the resistance is 480 ohms at a temperature of 160 k, find the resistance at a... more
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College Math Math Math Assignment

11/02/16

Math home work help
If Z varies inversely as w, and z = 8 when w=3, find z when w = 6.    Z=
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