Need help plz Will give 15 points. Select all of the equations that will produce exponential decay.

y = 1/2 (5)^x

y = (2)^x

y = (0.1)^x

y = 3(0.4)^x

y = 2( 1/4 )^x

y = (3)^x

Naomi’s parents want to have 50,000, saved for her college education, if they invest 20000 today and earn 7% interest compound annually, about how long will it take them to save 50 thousand

To describe a sequence of transformations that maps triangle abc onto triangle a"b"c", a student starts with a reflection over the x-axis.how should the student complete the sequence of transformations to map triangle abc onto triangle a"b"c"? plz

One side of a rectangle is 7 feet shorter than seven times the other side. find the length of the shorter side if we also know that the perimeter of the rectangle is 306 feet.