Answer:
E; 8x9 is equal to 72 which estimated is 70

an is the 'nth' term
a1 is first term
d=common difference (found by doing

)
n=numerical representation of which term
Hey there!
1.) let's remember that a acute angel is very tiny, it is less then 90 degrees. So we would want to find one of your options that would be very small.
46 would seem to be the answer.
x=46
Hope this helps you.
1081637.6 when rounded to the nearest tenth