Their can be 7 groups hope this helps
Set it up as a ratio:
mans shadow over mans height (4/6 ) equals flag pole shadow over flag pole height (15/x)
set them to equal each other:
4/6 = 15/x
cross multiply: 4*x =4x, 15*6 = 90
so you have 4x = 90
now divide both sides by 5 to solve for x, which is the height of the flag pole:
x = 90 / 4 = 22.5 feet tall
The answer is d. opposite angles are congruent.
-80x is the the problem
In this case, x=7
-80 times 7= -560
So -560 would be the integer that represents the depth of the submarine after 7 minutes.
For a trapezoid:
A=(17.3+10.7)×13.4/2=28×6.7=187.6 square feet
