Question 23 4 pts
A radioactive substance decays in such way that the amount of mass
remaining after t days is given by the functionm (t) = 12e-0.067t where
m(t) is measured in grams.
1. Find the mass at time t = 0.
2. How murh of the mass remains after 30 days? (Round to nearest
tenth of a gram)

Prove that 3: 8 is equivalent to 12: 32.a. use diagrams to support your answer.

Mr.zimmerman invested $25,000 in an account that draws 1.4 interest, compouneded annually. what is the total value of the account after 15 years

I've been working on this for a few days and i just don't understand, it's due in a few hours. you. the direction of a vector is defined as the angle of the vector in relation to a horizontal line. as a standard, this angle is measured counterclockwise from the positive x-axis. the direction or angle of v in the diagram is α. part a: how can you use trigonometric ratios to calculate the direction α of a general vector v = < x, y> similar to the diagram? part b suppose that vector v lies in quadrant ii, quadrant iii, or quadrant iv. how can you use trigonometric ratios to calculate the direction (i.e., angle) of the vector in each of these quadrants with respect to the positive x-axis? the angle between the vector and the positive x-axis will be greater than 90 degrees in each case. part c now try a numerical problem. what is the direction of the vector w = < -1, 6 > ?