Help with spanish asap thanks

Choose the best spanish equivalent to the phrase. you have to be ninth. tienes que ser el noventa. tienes que ser el noven. tienes que ser el noveno. tienes que ser la noventa.

Which one of the following is a trick used in spanish to identify the right hand? touch the tips of your index fingers with the tips of your thumbs. the hand that forms a lowercase b is your mano derecha. touch the tips of your index fingers with the tips of your thumbs. the hand that forms a lowercase d is your mano izquierda. touch the tips of your index fingers with the tips of your thumbs. the hand that forms a lowercase d is your mano derecha.

Page 13 of 25 (1 point) choose the best spanish word to complete the sentence. esteban y felipe biología. estudiamos estudian estudio estudiar