HELP 1)The number of hours it takes for a block of ice to melt varies inversely as the temperature. If it takes 2 hours for a square
inch of ice to melt at 65º, find the constant
of variation.
2) The cost per person to rent a mountain
cabin is inversely proportional to the number
of people who share the rent. If 5 people
share and it costs $36 per person, find the
constant of variation.
3) The width of a rectangle varies inversely with
its length. If the width is 4 when the length is
12, find the width when the length is 16.
4) The pitch of a musical note varies inversely
as its wavelength. If the tone has a pitch of
440 vibrations per second and a
wavelength of 2.4 feet, find the pitch of a
note that has a wavelength of 1.6 feet.

In the diagram below, dab and dac are adjacent angles. if mdac = 25°, what is mdab in degrees? what is mbac in degrees?

The rate of decay of a radioactive substance depends upon the amount present initially. the mass y (mg) of the radioactive substance cobalt-60 present in a sample at time t (years) is represented by the exponential equation y=50e −0.1315 t . answer the following questions in complete sentences. 1. how does the exponential equation above compare to the equation for simple interest that is compounded continuously? explain the similarities. 2. what is the initial amount of cobalt-60 in the sample? 2. how much cobalt-60 is left after 8.4 years? show your work. 3. what would be the y-intercept of the graph? what does it represent? 4. after how many years will the amount of cobalt-60 left be 6.25 mg? explain what happens to the cobalt-60 after 50 years? 5. discuss some “real-world” examples and uses of cobalt-60

10 ! in a race, nick is 50 feet in front of jay after ten seconds. how fast can nick run, if jay can run 20 feet per second?