7.- Dada la siguiente tabla de notas de un examen de todos los 2o de ESO en un instituto:

xi 2 3 4 5 6 7 8 9 10
fi 6 12 10 20 12 8 15 12 5
a) ¿Qué porcentaje de alumnos han suspendido?
b) ¿Qué porcentaje de alumnos tiene un notable?
c) ¿Cuántos alumnos han obtenido entre un 4 y un 8?

step-by-step explanation:

the original amount doesn't ''re just looking for the time it takes for 1/2 of the substance to we have

(1/2) =)     take the ln   of both sides

ln (1/2)   = )   and we can write

ln(1/2) = ) lne     and lne   = 1     so we have

ln(1/2) = -.1092t     divide both sides by -.1092

t = ln(1/2)/-.1092 = about 6.347 days = about 6.3 days (rounded)

the final price would be 29.6925

step-by-step explanation:

39.59 minus 25% equals 29.6925

i believe the answer is the polygon, heptagon.

110698.56 square miles

step-by-step explanation:

multiply 3.8 by 102

387.6

multiply 2.8 by 102

285.6

multiply those two to get