At the beginning of the year, Christopher had $50 in savings and saved an additional $5 each week thereafter. Aria started the year with $20 and saved $10 every week.
Let C represent the amount of money Christopher has saved t weeks after the
beginning of the year and let A represent the amount of money Aria has saved t
weeks after the beginning of the year. Graph each function and determine the
number of weeks after the beginning of the year until Christopher and Aria have the
same amount of money saved.

Nthe opening scene of the movie raiders of the lost ark, indiana jones replaces a golden statue with a bag of sand. the platform on which the statue is placed is designed to detect the mass of the statue. if the bag of sand has a different mass than the statue, then a mechanism triggers and destruction ensues. the density of gold is about 20\text{ g/cm}^320 g/cm 3 20, space, g, slash, c, m, start superscript, 3, end superscript. the density of sand can be estimated at 2.5\text{ g/cm}^32.5 g/cm 3 2, point, 5, space, g, slash, c, m, start superscript, 3, end superscript. the gold statue can be modeled as a cylinder with height 25\text{ cm}25 cm25, space, c, m and radius 8\text{ cm}8 cm8, space, c, m. in terms of \piπpi, what is the mass of sand indiana jones needs to avoid triggering the mechanism?