A thermometer reading 72 degrees Fahrenheit is placed in a refrigerator where the temperature is a constant 38 degrees Fahrenheit. a) If the thermometer reads 60 degrees Fahrenheit after 2 minutes, what will it read after 7 minutes

b)How long will it take before the thermometer reads 39 degrees Fahrenheit

c) Determine the time that must elapse before the thermometer reads 45 degrees Fahrenheit
Use this formula, kt=ln(T-S)/(To-S)
To=Initial Temp
T=Final Temp
S=Environmental Temperature
t=Time passed
k=constant ​

so what is the problem what are they asking you to solve

step-by-step explanation:

so what is the problem what are they asking you to solve

$6.42

step-by-step explanation:

the correct option is:

b. a value of the variable that makes the polynomial equal to zero.

the root or roots of a polynomial are the values of the variable that makes the polynomial equal to 0. we can find the roots of a polynomial making the expression equal to 0 and then, isolating the variable (it it has just one variable).

for example, given the following polynomial:

the root or zero of the polynomial, can be found by making the expression equal to 0, and then, isolating the variable, so, finding the root we have:

therefore, we have that the root of the polynomial is equal to 2.

we must remember that the number of roots that a polynomial can have, will depend on the degree of the polynomial, a first degree polynomial have will have one single root, a second degree polynomial (quadratic expression) may have two roots and so.

hence the correct option is:

b. a value of the variable that makes the polynomial equal to zero.

have a nice day!

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