As duas bases de um tronco de pirâmide regular são hexagonais de lados 12 cm e 20 cm. se a distância entre esses dois polígonos é 10 cm, então o volume do tronco, em cm3, vale

a
1.080 raiz quadrada de 3

b
2.940 raiz quadrada de 3

c
3.920 raiz quadrada de 3

d
4.900 raiz quadrada de 3

e
5.040 raiz quadrada de 3

What are “like terms”? why can we only add like terms?

The number of chocolate chips in an 18-ounce bag of chocolate chip cookies is approximately normally distributed with a mean of 1252 chips and standard deviation 129 chips. (a) what is the probability that a randomly selected bag contains between 1100 and 1500 chocolate chips, inclusive? (b) what is the probability that a randomly selected bag contains fewer than 1125 chocolate chips? (c) what proportion of bags contains more than 1225 chocolate chips? (d) what is the percentile rank of a bag that contains 1425 chocolate chips?

Sally deposited money into a savings account paying 4% simple interest per year. the first year, she earn $75 in interest. how much interest will she earn during the following year?