step-by-step explanation:∠c= 180-(90+30)
(so this is a standard 30 60 90 triangle, it if you have a drawing)ac=817cmyou'd have to use the angles since you don't have up to 2 sidesusing sin:
you're trying to find bc so it has to be either the opp or hyp. you know it's not hyp because you're already given that. the angle opposite bc is 30. that's how you know your angle's 30 and not 60
sin 30= bc/817
=408.5 cmusing cos:
same here. hyp is given so adj has to be bc. the angle adjacent to bc is 60 so 60 is the angle here and not 30.
bc= 817 cos 60 (adj=cos×hyp)
√ 225 s the rational number
ok to start off i'm pretty sure you meant to put (3x^2) rather than 3x^3, but i'll just ignore that part, so we first want to remove the parentheses and we add 6x^2-5x+3+3x^2+7x-8 so, we simplify and get: 9x^2+2x-5.
which is c.
if this mark me brainliest, and hit button!
ch offers 0.5%, compounded continuously.