Suppose that a slice of pizza at a temperature of 80°F has been placed inside a freezer, where the temperature is 2°F.
I know that the equation, dT(t)/td = k(T(t)-2º) would represent the rate at which the temperature, T is decreasing.
If the pizza cools to 45° in 1 hour, then its temperature after t hours...
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newtons law of cooling
A cup of coffee at 160° is placed in a room where the temperature is 70°. After 5 minutes, the coffee’s temperature is 112.5°.
Find the temperature of the coffee 10 minutes after it was placed...
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How long will it take..
A certain isotope has a half-life of 5.25 days. How long will it take for 30% of the sample to disintegrate?
Solutions are appreciated. Please answer. Arigatou sensei.
08/21/15
Distance Problems
When he runs against the wind, Ricky can run 16 km in 2 h. With the wind, he can run 5/4 of this distance in 2h. Find Ricky's running rate and the rate of the win. Assume that both are constant.
08/21/15
Need Summer Work Help (ASAP)!!
Literal Equations:
Solve for X. 3x+1/4y=z
Solve for x1. m=y2-y1/x2-x1
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a particle moves along the x-axis with its x coordinate given by the function s(t)=2t^3-21t^2+60t for t=0
what would be the speed when t=3 and how do you find the exact time the particle changes direction?
08/20/15
Word problem
Julio is paid 1.4 times his normal hourly rate for each hour he works over 30 in a week. Last week he worked 35 hours and earned $436.60. Write and solve an equation, to find Julio's normal hourly...
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08/20/15
helppp!!!!
What are ways discontinuous points can be accounted for graphically
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08/20/15
How can I solve this using equations?
A gym owner has some indigo weights and some green weights. The indigo weights are 9 kilograms each, and the green weights are 2 kilograms each. The owner has 9 weights, and they weigh 32 kilograms...
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08/19/15
What is the slope of a line that is parallel to a line with a slope of 1/2?
I don't get this question.
08/19/15
algebra 2 problem
I’m attempting to find the quotient and remainder and have no idea what to do
6x^3-5x^2+x+1divided by x+2
08/19/15
I have two questions and if can show the work that would be great for both
Calculate the sum for each of the following inifinite geometric series that converge
1) -16/81 + -8/27 + -4/9 + -2/3 +...
2) √10/4 + 10/16 + 10√10/(64) + 100/256 +...
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08/19/15
characteristics of functions
given the functions f(x)x+2 and g(x)= x2 determine all values of x for which f(g(x))=g(f(x))
08/19/15
multiple choice
determine the average rate of change of the function y=sin(x) from x=0 to x= pi/2a)0b)pi/2c)1d)2/pi
08/18/15
What coordinate will both people walk through
Gina and Marissa each walk in a straight line between two points. Using the points on a map that the girls created, Gina will start at (–6, –10) and will stop at (3, –1). Marissa will start at (4,...
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08/18/15
Trig question i dont understand
Give all radian solutions to cos7xcos2x+sin7xsin2x=1/2. How do I do this?
08/18/15
need help with a confusing trig question.
Write an expression equivalent to csc((2cot^-1)x), yet that does not use trigonometric functions. Assume the variable represents a positive value.
Equation to find the amount left after t years
Suppose that a sample initially contains N0 grams of a radioactive substance. If this substance has a half-life of 32 years, then which of the following equations can be used to find the amount...
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Which of these differential equations is NOT seperable?
dy/dy=x+y
dy/dy=xy
dy/dy=x/y
dy/dy=2xy
08/18/15
reciprocal of a function
explain what occurs to the x-intercepts of a function, when sketching its reciprocal and why.
08/18/15
Which restaurant's pizza is a better buy?
Square Deal Pizza offers square pizza that is 15 inches long on each side.A cheese pizza costs $9.00.
Roundoff Pizza offers circular pizza that is 16 inches in diameter.A cheese pizza costs...
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