Solve the problem.When a radioactive substance decays, the number N of grams remaining from an initial mass N0 (in grams) is given by 
where n is the number of half-lives for which the substance has decayed. Given that the half-life for tritium is 14 years, find the rate in (grams/half-life) at which a 102-gram initial mass of radioactive tritium decays after 44.8 years.
A. -70.7 g/half-life
B. -11.1 g/half-life
C. -7.69 g/half-life
D. -3.38 g/half-life
Answer: C
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Solve the equation for the indicated variable.I = 
for n
A. n = 
B. n = 
C. n = 
D. n = IR(Ir - E)
Rationalize the numerator.
?
What will be an ideal response?
Solve the problem.The area of a rectangular piece of cardboard shown is 860 square inches. The cardboard is used to make an open box by cutting a 4-inch square from each corner and turning up the sides. If the box is to have a volume of 1680 cubic inches, find the dimensions of the cardboard that must be used.
A. 12 inches by 31 inches B. 20 inches by 43 inches C. 16 inches by 39 inches D. 24 inches by 47 inches
Determine whether the pair of fractions is equivalent.
and 
A. equivalent B. not equivalent