Which transformations will produce similar, but not congruent, figures?

a).triangle pqr is reflected across the y-axis and then dilated by a scale factor of 6 to form triangle p"q"r" .

b). triangle pqr is rotated 180° counterclockwise and then translated 11 units left to form triangle p"q"r" .

c).triangle pqr is reflected across the x-axis and then rotated 90° clockwise to form triangle p"q"r" .

d). triangle pqr is rotated 90° clockwise and then reflected across the y-axis to form triangle p"q"r" .

David must install fencing around a lot that is shaped like a right angle.the side of lot that runs east-west is 200 ft long.the side of the lot runs north-south is 125 ft long.calculate how many feet of fencing he will need to surround the entire lot.

The rate of decay of a radioactive substance depends upon the amount present initially. the mass y (mg) of the radioactive substance cobalt-60 present in a sample at time t (years) is represented by the exponential equation y=50e −0.1315 t . answer the following questions in complete sentences. 1. how does the exponential equation above compare to the equation for simple interest that is compounded continuously? explain the similarities. 2. what is the initial amount of cobalt-60 in the sample? 2. how much cobalt-60 is left after 8.4 years? show your work. 3. what would be the y-intercept of the graph? what does it represent? 4. after how many years will the amount of cobalt-60 left be 6.25 mg? explain what happens to the cobalt-60 after 50 years? 5. discuss some “real-world” examples and uses of cobalt-60

Select the number of ways in which a line and a circle can intersect