The coordinates of the preimage are: a(8,8) b(10,6) c(2,2) we want to reflect over y=−1 first. our new coordinates are: a′(8, ) b′(10, ) c′(2, ) now we will reflect over y=−7 and our new coordinates will be: a′′(8, ) b′′(10, ) c′′(2, ) we can also see that −7−(−1)=−6. we know that two reflections is the same as a translation of 2h units. so 2(−6) is a translation of −12 units down.

1)A'(8,-10), B'(10,-8), C'(2,-4)

2)A''(8,-4), B''(10,-6), C''(2,-10)

Step-by-step explanation:

Given:

Points A(8,8) B(10,6) C(2,2)

reflection over y=-1

Perpendicular distance between points y-coordinates of points (A, B and C) and y=-1 are 9,7 and 3

after reflections, the perpendicular distance will be 18,14,6 and the points will be at

A'(8,-10), B'(10,-8), C'(2,-4)

Now

Points A(8,-10), B(10,-8), C(2,-4)

reflection over y=−7

Perpendicular distance between points y-coordinates of points (A, B and C) and y=-7 are 3,1 and 3

after reflections, the perpendicular distance will be 6,2,6 and the points will be at

A''(8,-4), B''(10,-6), C''(2,-10) !

  about 5.6 days

step-by-step explanation:

we can fill the given information into the decay equation and solve for the value of t at which half the sample remains.

the half-life is about 5.6 days.

add an image

step-by-step explanation: