The half-life of a radioactive isotope is the time it takes for a quantity of the isotope to be reduced to half its initial mass. Starting with 210 grams of a radioactive isotope, how much will bë left after 3 half-lives? Use the calculator provided and round your answer to the nearest gram.

The equation is \( 2.6 x \quad=1.8 x \) The weight of 1 cubic foot of water is

\( \left. \begin{array} { l } { F ( x ) = 2 x + 3 } \\ { F ( x ) = 4 x ^ { 2 } - 5 } \end{array} \right. \)

\( \int _{}^{}\sqrt {9x^{6}-3x^{3}-1}x^{2} d x \)

¿Cuál es la longitud de onda (en nm ) de De Broglie asociada a una pelota de ping- ng de 2.5 g que viaja a 35 mph ? ( \( 1 \mathrm{milla} / \mathrm{h}=0.44704 \mathrm{~m} / \mathrm{s} \) )

Evaluate the following indefinite integral. \[ \int \frac{5}{\sqrt{x}} \mathrm{dx} \]